A follow up to the locking part, now for `unlock` am: 8609037c8a

Original change: https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/2441748

Change-Id: I2dc97351966ad538c4d5809d3b23d45bff1d4ed4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>