Android: Fix device volume not working (#663)

src/pandroid/app/src/main/java/com/panda3ds/pandroid/app/GameActivity.java

@@ -152,6 +152,10 @@ public class GameActivity extends BaseActivity implements EmulatorCallback, Sens
 
 	@Override
 	public boolean dispatchKeyEvent(KeyEvent event) {
+		if (event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_UP || event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_DOWN) {
+                    return super.dispatchKeyEvent(event);
+		}
+		
 		if ((!drawerFragment.isOpened()) && InputHandler.processKeyEvent(event)) {
 			return true;
 		}