Ensure forwarding listener target is long-clickable

    public ForwardingListener(View src) {

        mSrc = src;

        src.setLongClickable(true);

        src.addOnAttachStateChangeListener(this);

        mScaledTouchSlop = ViewConfiguration.get(src.getContext()).getScaledTouchSlop();

        mTapTimeout = ViewConfiguration.getTapTimeout();

        // Use a medium-press timeout. Halfway between tap and long-press.

        mLongPressTimeout = (mTapTimeout + ViewConfiguration.getLongPressTimeout()) / 2;

        src.addOnAttachStateChangeListener(this);

    }

    /**