Unregister receiver to prevent leak, change exception catching to a generic one

Author: JulianKast

android/hello_sdl_android/src/main/java/com/sdl/hellosdlandroid/SdlReceiver.java

@@ -45,7 +45,8 @@ public void onSdlEnabled(Context context, Intent intent) {
                 }
                 try {
                     pendingIntent.send(context, 0, intent);
-                } catch (PendingIntent.CanceledException e) {
+                    context.unregisterReceiver(this);
+                } catch (Exception e) {
                     e.printStackTrace();
                 }
             }