Updated layout for more compact player

- App icon is now on the corner of album art
- Small player is condensed, with smaller art
- No album art will instead show a fallback view with device icon
- Device name shows in output switcher
- Adjusted colors and dimens to match spec
- Fixed bug where too many compact actions could be shown

Test: visual
Test: atest com.android.systemui.media
Bug: 176177555
Bug: 182292357
Change-Id: I56ec5c5f1188f7547b6e74a2f9bf8d1ad2ee21e4