Fix incorrect colors for CustomTile in QS

Add support for Supplier<Icon> in QSTile.State, allowing a method for
CustomTile not to cache the drawable for its IconViews. This fixes the
problem that the ImageViews in QQS and QS were trying to use the same
drawable and putting it in a bad state.

Test: Add 3rd party tile to first position in QS and turn on/off; visual
Change-Id: I408d6391a718fcb3f847e72bd303551d2d004dbb
Fixes: 67356768