Fixed mutable pending intents

app/src/main/java/eu/faircode/email/Core.java

@@ -4900,7 +4900,7 @@ class Core {
                         .setAction("reply:" + message.id)
                         .putExtra("group", group);
                 PendingIntent piReply = PendingIntentCompat.getService(
-                        context, ServiceUI.PI_REPLY_DIRECT, reply, PendingIntent.FLAG_UPDATE_CURRENT);
+                        context, ServiceUI.PI_REPLY_DIRECT, reply, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_MUTABLE);
                 NotificationCompat.Action.Builder actionReply = new NotificationCompat.Action.Builder(
                         R.drawable.twotone_reply_24,
                         context.getString(R.string.title_advanced_notify_action_reply_direct),

app/src/main/java/eu/faircode/email/PendingIntentCompat.java

@@ -31,21 +31,21 @@ public class PendingIntentCompat {
     }
 
     public static PendingIntent getActivity(Context context, int requestCode, Intent intent, int flags) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M || (flags & PendingIntent.FLAG_MUTABLE) != 0)
             return PendingIntent.getActivity(context, requestCode, intent, flags);
         else
             return PendingIntent.getActivity(context, requestCode, intent, flags | PendingIntent.FLAG_IMMUTABLE);
     }
 
     public static PendingIntent getService(Context context, int requestCode, @NonNull Intent intent, int flags) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M || (flags & PendingIntent.FLAG_MUTABLE) != 0)
             return PendingIntent.getService(context, requestCode, intent, flags);
         else
             return PendingIntent.getService(context, requestCode, intent, flags | PendingIntent.FLAG_IMMUTABLE);
     }
 
     static PendingIntent getForegroundService(Context context, int requestCode, @NonNull Intent intent, int flags) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O || (flags & PendingIntent.FLAG_MUTABLE) != 0)
             return PendingIntent.getService(context, requestCode, intent, flags);
         else
             return PendingIntent.getForegroundService(context, requestCode, intent, flags | PendingIntent.FLAG_IMMUTABLE);