Merge "BufferPoolClient: avoid dereference null accessor" into main am: 85333361c1 am: 71d3a7ccbc

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2889801

Change-Id: I9e01d6c66e2459ed9f58451a73e586145ea6cbe0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>