Merge "Revert "[Media] Update background gradient scrim to use album theme...

Merge "Revert "[Media] Update background gradient scrim to use album theme colors."" into tm-dev am: 783f9c90

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18027822



Change-Id: Iafff328716eff4ab38487832ee28c745ae270d64
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>