Use read-write lock to guard property config. am: acd65a80

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3279799



Change-Id: Ib2494b37d1f2a1218b7be420c6ef6f0bc480859b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>