Unregister some listeners to avoid leaking #655

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/ControlCenterv2.java

@@ -203,6 +203,13 @@ public class ControlCenterv2 extends AppCompatActivity
         }
     }
 
+    @Override
+    protected void onDestroy() {
+        unregisterForContextMenu(deviceListView);
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(mReceiver);
+        super.onDestroy();
+    }
+
     @Override
     public void onBackPressed() {
         DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);