Merge "Add an option for vendors to provide a camera extensions proxy" into sc-dev am: b4d7c251 am: 13349aac am: 55a2fb8d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15001230

Change-Id: Id2aadfeed5a5dba0193c2843d459178d8cd8a4ed