[automerger skipped] Merge "Remove uses of background color attribute" into sc-qpr1-dev am: d0561dca am: a27f9eae -s ours

am skip reason: Merged-In Iee395289ecd108327fa2acc23d19059b50f52822 with SHA-1 e11ecf0c is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15897415

Change-Id: I74d616985b648b48969e88bfe8a94ca3d718c669