[CQ] AddToAppUtils: fix deprecated API use and unchecked calls (#8012)

Migrate to future-safe `modulesAdded` API and fix unchecked calls.

(Removing another bit of noise from the run console.)


![image](https://github.com/user-attachments/assets/820a76c6-a99a-4251-9bab-f684fff60754)

See: #7718.

Author: pq

Diff for: flutter-studio/src/io/flutter/utils/AddToAppUtils.java

@@ -36,6 +36,7 @@
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
 import java.util.Collection;
+import java.util.List;
 
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
@@ -59,24 +60,30 @@ public static boolean initializeAndDetectFlutter(@NotNull Project project) {
     if (!FlutterModuleUtils.hasFlutterModule(project)) {
       connection.subscribe(ModuleListener.TOPIC, new ModuleListener() {
         @Override
-        public void moduleAdded(@NotNull Project proj, @NotNull Module mod) {
-          if (AndroidUtils.FLUTTER_MODULE_NAME.equals(mod.getName()) ||
-              (FlutterUtils.flutterGradleModuleName(project)).equals(mod.getName())) {
-            //connection.disconnect(); TODO(messick) Test this deletion!
-            AppExecutorUtil.getAppExecutorService().execute(() -> {
-              GradleUtils.enableCoeditIfAddToAppDetected(project);
-            });
+        public void modulesAdded(@NotNull Project proj, @NotNull List<? extends Module> modules) {
+          for (Module module : modules) {
+            if (module == null) continue;
+            if (AndroidUtils.FLUTTER_MODULE_NAME.equals(module.getName()) ||
+                (FlutterUtils.flutterGradleModuleName(project)).equals(module.getName())) {
+              //connection.disconnect(); TODO(messick) Test this deletion!
+              AppExecutorUtil.getAppExecutorService().execute(() -> {
+                GradleUtils.enableCoeditIfAddToAppDetected(project);
+              });
+            }
           }
+
         }
       });
       return false;
     }
     else {
       Collection<ProjectType> projectTypes = ProjectTypeService.getProjectTypes(project);
-      for(ProjectType projectType : projectTypes) {
-        if (projectType != null && "Android".equals(projectType.getId())) {
-          // This is an add-to-app project.
-          connection.subscribe(DebuggerManagerListener.TOPIC, makeAddToAppAttachListener(project));
+      if (projectTypes != null) {
+        for (ProjectType projectType : projectTypes) {
+          if (projectType != null && "Android".equals(projectType.getId())) {
+            // This is an add-to-app project.
+            connection.subscribe(DebuggerManagerListener.TOPIC, makeAddToAppAttachListener(project));
+          }
         }
       }
     }