camera aidl: 'empty' native handles not 'null' native handles am: 29b87463f4 am: eea598ddce

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2250554

Change-Id: I3c4ae4fce20362187801260249926930439bd689
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>