Merge "ExternalCameraHAL: Check for empty native handle instead of null." into main am: 7e4037cf01 am: 610693feb0

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

Change-Id: Iddc07cf9a968372996d9d0fff7b7e0130373c525
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>