Release plugin binding when activity is detached. (#1264)

permission_handler_android/CHANGELOG.md

+## 12.0.2
+
+* Fixes bug where Android activity is leaked when embedded in native Android application.
+
 ## 12.0.1
 
 * Fixes a bug where the `ignoreBatteryOptimizations` permission didn't report the correct status when the permission is requested and granted.

permission_handler_android/android/src/main/java/com/baseflow/permissionhandler/PermissionHandlerPlugin.java

@@ -75,7 +75,7 @@ public final class PermissionHandlerPlugin implements FlutterPlugin, ActivityAwa
             binding.getActivity()
         );
 
-        this.pluginBinding = binding;
+        pluginBinding = binding;
         registerListeners();
     }
 
@@ -87,8 +87,8 @@ public final class PermissionHandlerPlugin implements FlutterPlugin, ActivityAwa
     @Override
     public void onDetachedFromActivity() {
         stopListeningToActivity();
-
         deregisterListeners();
+        pluginBinding = null;
     }
 
     @Override

permission_handler_android/pubspec.yaml

 name: permission_handler_android
 description: Permission plugin for Flutter. This plugin provides the Android API to request and check permissions.
 homepage: https://github.com/baseflow/flutter-permission-handler
-version: 12.0.1
+version: 12.0.2
 
 environment:
   sdk: ">=2.15.0 <4.0.0"