[google_maps_flutter] Add iOS SDK 9.x support (#6902)

Expands the range of supported versions of the iOS Google Maps SDK to include 9.x. To ensure build compatibility coverage, this follows the previously-established model of making duplicate example apps with different min iOS versions, but without most of the tests (as described in example/README.md).

The new `ios15` example directory is a duplicate of `ios14/` with:
- The min project and Podfile versions upped to 15.0 (I've validated locally that this causes a build to get 9.0 of the SDK).
- The integration tests and XCUITest are removed.
- All but the main plugin XCTest tests are removed (that file is left mainly as a placeholder to add new unit tests if necessary).

This does not remove the privacy manifest workaround for 8.4, as we still support 8.4; the resulting duplication should be harmless for now. See discussion in flutter/flutter#146838.

Fixes flutter/flutter#149873

packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.8.0
+
+* Adds compatibility with SDK version 9.x for apps targetting iOS 15+.
+
 ## 2.7.0
 
 * Adds support for BitmapDescriptor classes `AssetMapBitmap` and `BytesMapBitmap`.

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/README.md

@@ -0,0 +1,13 @@
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Versions
+
+This example requires iOS 15, so will select a 9.x GoogleMaps SDK version.

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/assets/night_mode.json

@@ -0,0 +1,162 @@
+[
+  {
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#242f3e"
+      }
+    ]
+  },
+  {
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#746855"
+      }
+    ]
+  },
+  {
+    "elementType": "labels.text.stroke",
+    "stylers": [
+      {
+        "color": "#242f3e"
+      }
+    ]
+  },
+  {
+    "featureType": "administrative.locality",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#d59563"
+      }
+    ]
+  },
+  {
+    "featureType": "poi",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#d59563"
+      }
+    ]
+  },
+  {
+    "featureType": "poi.park",
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#263c3f"
+      }
+    ]
+  },
+  {
+    "featureType": "poi.park",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#6b9a76"
+      }
+    ]
+  },
+  {
+    "featureType": "road",
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#38414e"
+      }
+    ]
+  },
+  {
+    "featureType": "road",
+    "elementType": "geometry.stroke",
+    "stylers": [
+      {
+        "color": "#212a37"
+      }
+    ]
+  },
+  {
+    "featureType": "road",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#9ca5b3"
+      }
+    ]
+  },
+  {
+    "featureType": "road.highway",
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#746855"
+      }
+    ]
+  },
+  {
+    "featureType": "road.highway",
+    "elementType": "geometry.stroke",
+    "stylers": [
+      {
+        "color": "#1f2835"
+      }
+    ]
+  },
+  {
+    "featureType": "road.highway",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#f3d19c"
+      }
+    ]
+  },
+  {
+    "featureType": "transit",
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#2f3948"
+      }
+    ]
+  },
+  {
+    "featureType": "transit.station",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#d59563"
+      }
+    ]
+  },
+  {
+    "featureType": "water",
+    "elementType": "geometry",
+    "stylers": [
+      {
+        "color": "#17263c"
+      }
+    ]
+  },
+  {
+    "featureType": "water",
+    "elementType": "labels.text.fill",
+    "stylers": [
+      {
+        "color": "#515c6d"
+      }
+    ]
+  },
+  {
+    "featureType": "water",
+    "elementType": "labels.text.stroke",
+    "stylers": [
+      {
+        "color": "#17263c"
+      }
+    ]
+  }
+]
+

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>UIRequiredDeviceCapabilities</key>
+  <array>
+    <string>arm64</string>
+  </array>
+  <key>MinimumOSVersion</key>
+  <string>12.0</string>
+</dict>
+</plist>

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/ios/Flutter/Debug.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/ios/Podfile

@@ -0,0 +1,43 @@
+# Uncomment this line to define a global platform for your project
+platform :ios, '15.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+
+    pod 'OCMock', '~> 3.9.1'
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end