Merge "Explain the -hide params passed to doclava" into main am: a8b4f6f7af am: c457428cf9 am: 01c0e4e821

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

Change-Id: I5664c09354308e781bf6a37c0c8b763f48144b7c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>