[automerger skipped] Merge "Fix thread safety issue on clearing cache" into rvc-dev am: 5d559ac700 -s ours am: 557c900d60 -s ours am: 36b1178692 -s ours
am skip reason: Change-Id I47d53a6d9d274bca4c78dbfd87e0097091b7b8cb with SHA-1 db097214b1 is in history
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13375628
MUST ONLY BE SUBMITTED BY AUTOMERGER
Change-Id: I71861fce273fe5f1ce15b7e0a721edc4d5386aa1
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