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

Merge "[Media] Update background gradient scrim to use album theme colors." into tm-dev am: 64bf097a am: f5179d41

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17896371



Change-Id: I02f41274b7fc4643eb1bb69f0f956421722b5af9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>