Merge "hwc2: add locks for callback functions" into rvc-dev am: fbed8adaff am: f04cf61a55 am: 6df31d5a42 am: 83eacf487b

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/qcom/sdm845/display/+/11837781

Change-Id: Iae5f7effeda2ae3ea52837b9b7f7684b0397c915