Fix Android 13+ notification permissions

frontend/android/app/build.gradle.kts

@@ -10,6 +10,7 @@ android {
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
+        isCoreLibraryDesugaringEnabled = true
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
     }
@@ -41,3 +42,7 @@ android {
 flutter {
     source = "../.."
 }
+
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
+}

frontend/android/app/src/main/AndroidManifest.xml

@@ -12,6 +12,9 @@
         android:name="android.permission.CAMERA"/>
     <uses-permission
         android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.VIBRATE"/>
     <application
         android:usesCleartextTraffic="true"
         android:label="TIS RMS"

frontend/lib/core/services/notification_service.dart

@@ -45,6 +45,13 @@ class NotificationService {
       },
     );
 
+    if (!kIsWeb && Platform.isAndroid) {
+      final AndroidFlutterLocalNotificationsPlugin? androidImplementation =
+          _flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
+              AndroidFlutterLocalNotificationsPlugin>();
+      await androidImplementation?.requestNotificationsPermission();
+    }
+
     _initialized = true;
   }