hw2: guard against invalid cb_handle am: e149ab0bbc am: 533536d0df am: 3e6a1c6316 am: 62ca3b453f am: 89c8e722f0 am: 6dc80ece0d am: 759df6c11d

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/26050304

Change-Id: I9691f82ccf6d819b92879ab5a554559640038740
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>