Merge "Camera: Improve documentation for 3A regions" into tm-dev am:...

Merge "Camera: Improve documentation for 3A regions" into tm-dev am: 7af7fcbe am: d9171cef am: 987378d3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17450512



Change-Id: I2916948cae8032d9e9175406070baf894e58022f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>