[automerger skipped] Merge "Remove uses of background color attribute" into sc-v2-dev am: 136f3aa24f am: 680ca52f75 -s ours
am skip reason: Merged-In Iee395289ecd108327fa2acc23d19059b50f52822 with SHA-1 79d2fc8b6f is already in history
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15897593
Change-Id: I057875c57627c9df37173f92717720947ff50372
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