Merge "Add an option for vendors to provide a camera extensions proxy" into sc-dev am: b4d7c251 am: da4b7158 am: 78806bbd

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

Change-Id: I1387a63de03dd388fce5d80e0a29b87d1e7c9020