Collapse QS panel forcibly after dismissing Keyguard

The Quick Settings panel is not collapsed when the screen lock is
unlocked by using TileService APIs (unlockAndRun() and
startActivityAndCollapse()).
To fix this issue, the QS panel should be collapsed forcibly when
startActivityAndCollapse() is called.

Bug: 38252721
Test: manual - install an app which calls startActivityAndCollapse()
               inside the runnable passed to unlockAndRun().

Author: Yuta Yamada <yuta.x.yamada@sonymobile.com>
Change-Id: I82d1df368d5024283f58ee5cc2d42559aac28467