Merge "Camera: Improve session parameter documentation" into udc-dev am: 5a2fc5fa40

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24622278

Change-Id: I2b2a22ae96b1de358e930aadc4a12aa6dbd6dc22
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>