[automerger skipped] Merge "Remove uses of background color attribute" into sc-qpr1-dev am: d0561dcae0 -s ours am: b5a1c65a8f -s ours am: 227f11f082 -s ours
am skip reason: Merged-In Iee395289ecd108327fa2acc23d19059b50f52822 with SHA-1 e11ecf0c3a is already in history
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15897415
Change-Id: I096d1b331f2f44fd15cee44418be0984b7edca48
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