Merge "Add vendor extension effect example" am: 9e741d67 am: 44940230 am: 6e7b5f06

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2470400



Change-Id: Ib8423d2dbe8162f7d4d014fda0877832419128c1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>