pure_android_host_apps android versions update (flutter#163617)

- **update pure_android_host_apps/android_custom_host_app to
compileSdk/targetSdk 35, newest stable agp and gradle versions, update
source compatibility to java 17, updated dependencies**
- **Update documentation and migrate compileSdkVersion to compileSdk**
- **Update gitignore to ignore specific module folder name and
local.properties repo wide**

Related to flutter#149836 

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

.gitignore

@@ -74,10 +74,10 @@ unlinked_spec.ds
 **/android/captures/
 **/android/gradlew
 **/android/gradlew.bat
-**/android/local.properties
 **/android/**/GeneratedPluginRegistrant.java
 **/android/key.properties
 *.jks
+local.properties
 
 # iOS/XCode related
 **/ios/**/*.mode1v3

dev/devicelab/bin/tasks/module_custom_host_app_name_test.dart

@@ -242,6 +242,7 @@ Future<void> main() async {
         'intermediates',
         'assets',
         'debug',
+        'mergeDebugAssets',
         'flutter_assets',
         'assets',
         'read-only.txt',
@@ -315,6 +316,7 @@ Future<void> main() async {
         'intermediates',
         'assets',
         'release',
+        'mergeReleaseAssets',
         'flutter_assets',
         'assets',
         'read-only.txt',

dev/integration_tests/pure_android_host_apps/.gitignore

@@ -0,0 +1,2 @@
+# Name for module used in integration test that should not be checked in.
+hello/

dev/integration_tests/pure_android_host_apps/android_custom_host_app/README.md

@@ -3,6 +3,8 @@
 Android host app for a Flutter module created using
 ```sh
 $ flutter create -t module hello
+$ cd hello
+$ flutter build aar
 ```
 and placed in a sibling folder to (a clone of) the host app.
 Used by the `module_custom_host_app_name_test.dart` device lab test.

dev/integration_tests/pure_android_host_apps/android_custom_host_app/SampleApp/build.gradle

@@ -6,7 +6,7 @@ apply plugin: 'com.android.application'
 
 android {
     namespace = "io.flutter.add2app"
-    compileSdk 34
+    compileSdk = 35
 
     // Flutter's CI installs the NDK at a non-standard path.
     // This non-standard structure is initially created by
@@ -18,20 +18,20 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
 
     defaultConfig {
         applicationId "io.flutter.add2app"
-        minSdkVersion 21
-        targetSdkVersion 34
+        minSdk = 21
+        targetSdk = 35
         versionCode 1
         versionName "1.0"
     }
 }
 
 dependencies {
     implementation project(':flutter')
-    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
 }

dev/integration_tests/pure_android_host_apps/android_custom_host_app/build.gradle

@@ -8,7 +8,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.1.0'
+        classpath 'com.android.tools.build:gradle:8.8.1'
     }
 }
 

dev/integration_tests/pure_android_host_apps/android_custom_host_app/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Tue Feb 18 12:03:21 EST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip