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 am: b5f75b43

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



Change-Id: Ife74277bf4e7cc4424e723dad15b3d68aa93a9f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>