Merge changes I1bad66e2,Ibc93597e,Id985fc28 into nyc-dev am: fef8cfc3
am: aabdff83
* commit 'aabdff83':
Remove the highlight on the overview button in the screen pinning dialog
Fixing bad regression in alt-tab layout.
Workaround to ensure that a SystemUI process is always available.
Change-Id: Ie0dd1c95eed3c00c83b3585dc2d9116a843064c0