Merge "NdkMediaDrm: send provision event with 0 data" am: facb434dc1 am: f36125feba am: c0bf3358d2 am: ac9341fa20

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2157776

Change-Id: I876d683dac434fee2a441d9d25139696f5920e13
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>