Merge "ExternalCameraHAL: Check for empty native handle instead of null." into main am: 7e4037cf01 am: b6452b7ad8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2787022

Change-Id: I644ac5a50758874af31c87e075eda77fe5483d6b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>