Add QS media player options

This adds a mini player in the QQS, and media carousel in QS
Incorporates the WIP layout changes from ag/9415169

To enable: adb shell settings put system qs_media_player 1
then toggle dark mode, or adb shell stop && adb shell start

Known issues with color overlays not updating until you press a button,
and old sessions do not get automatically removed from the carousel.

Test: manual
Change-Id: Iaeda470a920cb115c28ec98f04d74f255e1d5a12