Merge "[Media] Update background gradient scrim to use album theme colors." into tm-dev am: 64bf097a am: 5d7b72bf am: 9d450d0c am: 9ae4e892

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



Change-Id: Ife82c9758bbfdef61a3308d32e751fcdb64cd5ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>