Merge "Fix race condition when setting boot color sysproprs." into sc-qpr1-dev am: 5541e5a2fa am: 5c896054f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15680184

Change-Id: I0a91ed6ca53b4dcfdcea7af47288a73866d19095