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: I2ca6c9e4cb33541790e8ff8a085c5a7ff2084006
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>