Merge "Explain the -hide params passed to doclava" into main am: a8b4f6f7af

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2796300

Change-Id: I6a9db8c0eda5cb6b96cb232ef87eb7672b61570a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>