Implement QQS for BC25

This implements QQS using the first N rows of tiles, with a grid of
mixed small and large tiles.

Also, change QuickSettingsShadeScene to use AnimatedContent

Test: manual, using prototype activity
Test: atest com.android.systemui.qs.panels
Fixes: 349794543
Flag: com.android.systemui.qs_ui_refactor

Change-Id: I00b6cb01100eaa588e333ef0fc117de11439cae9