Launcher2 滑动过程中快速点击界面

issue:
滑动过程中快速点击界面导致滑动的上一页留边在当前页

code:

修改前final boolean finishedScrolling = (mScroller.isFinished() || xDist < mTouchSlop);
修改后final boolean finishedScrolling = (mScroller.isFinished() && xDist < mTouchSlop);