Merge "SurfaceFlinger: fix a potential race condition in stealReceiveChannel...

Merge "SurfaceFlinger: fix a potential race condition in stealReceiveChannel am: 899e8cd0 am: aef61410" into tm-d1-dev-plus-aosp am: 4bee4397 am: 2da19ed5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18764134



Change-Id: I5459516687ec419d95e1cb6e28c2a214f5521220
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>