Merge "Add methods to get vendor extension interfaces" am: 1d6f1c9d04 am: 8ed7a545a7 am: bd75d74c59 am: 39dbf1ac0c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1826093

Change-Id: Icfeb8b0a1cddf488979b44fe726e9e68ddf03406