Add mandetory intent flags

Since SDK 31 for an 'PendingIntent' the intent flags 'FLAG_IMMUTABLE' or
'FLAG_IMMUTABLE' are mandetory.

Signed-off-by: Tim Krüger <t@timkrueger.me>

app/src/gplay/java/com/nextcloud/talk/services/firebase/MagicFirebaseMessagingService.kt

@@ -24,6 +24,7 @@ import android.app.Notification
 import android.app.PendingIntent
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.os.Handler
 import android.util.Base64
@@ -168,7 +169,7 @@ class MagicFirebaseMessagingService : FirebaseMessagingService() {
                 Log.d(NotificationWorker.TAG, "Invalid private key " + e1.localizedMessage)
             }
         } catch (exception: Exception) {
-            Log.d(NotificationWorker.TAG, "Something went very wrong " + exception.localizedMessage)
+            Log.d(NotificationWorker.TAG, "Something went very wrong " + exception.localizedMessage, exception)
         }
     }
 
@@ -217,7 +218,11 @@ class MagicFirebaseMessagingService : FirebaseMessagingService() {
                     this@MagicFirebaseMessagingService,
                     0,
                     fullScreenIntent,
-                    PendingIntent.FLAG_UPDATE_CURRENT
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                        PendingIntent.FLAG_MUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
+                    } else {
+                        PendingIntent.FLAG_UPDATE_CURRENT
+                    }
                 )
 
                 val soundUri = getCallRingtoneUri(applicationContext!!, appPreferences!!)
@@ -319,6 +324,7 @@ class MagicFirebaseMessagingService : FirebaseMessagingService() {
                 override fun onError(e: Throwable) {
                     // unused atm
                 }
+
                 override fun onComplete() {
                     stopForeground(true)
                     handler.removeCallbacksAndMessages(null)

app/src/main/java/com/nextcloud/talk/jobs/NotificationWorker.java

@@ -295,7 +295,13 @@ public class NotificationWorker extends Worker {
         // Use unique request code to make sure that a new PendingIntent gets created for each notification
         // See https://github.com/nextcloud/talk-android/issues/2111
         int requestCode = (int) System.currentTimeMillis();
-        PendingIntent pendingIntent = PendingIntent.getActivity(context, requestCode, intent, 0);
+        int intentFlag;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            intentFlag = PendingIntent.FLAG_MUTABLE;
+        } else {
+            intentFlag = 0;
+        }
+        PendingIntent pendingIntent = PendingIntent.getActivity(context, requestCode, intent, intentFlag);
 
         Uri uri = Uri.parse(signatureVerification.getUserEntity().getBaseUrl());
         String baseUrl = uri.getHost();
@@ -422,8 +428,15 @@ public class NotificationWorker extends Worker {
         // It is NOT the same as the notification ID used in communication with the server.
         actualIntent.putExtra(BundleKeys.INSTANCE.getKEY_SYSTEM_NOTIFICATION_ID(), systemNotificationId);
         actualIntent.putExtra(BundleKeys.INSTANCE.getKEY_ROOM_TOKEN(), decryptedPushMessage.getId());
+
+        int intentFlag;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            intentFlag = PendingIntent.FLAG_MUTABLE|PendingIntent.FLAG_UPDATE_CURRENT;
+        } else {
+            intentFlag = PendingIntent.FLAG_UPDATE_CURRENT;
+        }
         PendingIntent replyPendingIntent =
-            PendingIntent.getBroadcast(context, systemNotificationId, actualIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+            PendingIntent.getBroadcast(context, systemNotificationId, actualIntent, intentFlag);
 
         NotificationCompat.Action replyAction =
             new NotificationCompat.Action.Builder(R.drawable.ic_reply, replyLabel, replyPendingIntent)