SystemUI: Squash custom tile commits

Add custom tile permissions.

Change-Id: I66ba62b525c937bf920fed0145ca1f789495e6ef

SystemUi: Surface Custom Tiles published by 3rd parties.

Change-Id: Id5046c1bd2c3530eb243f6d7b8cc4e8aa10685ed

SystemUI: Allow for creation of external package drawables.

Change-Id: Iefacf23ee178369242b9f240dec7ab585084745b

SystemUi: Create CustomTile detail pane with remove options.

Change-Id: I32612166d9256ee1ec03448d65533caf6ad1eb18

SystemUI: Surface provided settings intent by custom tiles.

Change-Id: I877c7548220102bc61d835ee114535de4799afaf

SystemUi: Collapse panels when onClick pending intent is fired.

Change-Id: I4bd9a9a223a1cd35f25d702c274dc26a4ad90b7e

SystemUI: Clean up custom tile ui and behavior.

Change-Id: Ibb65ceffd179529953a976d604739086bea3123b

SystemUI: Collapse panel prior to removing a custom tile.

  Saves from needing to invalidate the qs panel to
  properly remeasure.

Change-Id: I524740ae0c72e12e8df6373d7758398384038e99