Merge "Add available since doc" into udc-dev am: e1788e69 am: 970f600e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22122947



Change-Id: I2b2ea637c89c12f2e95e23356dc3e39410d60727
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>