Merge "Cleanup obsolete doc build targets" into main am: a445bfed96 am: b058ee568f am: e048e78282

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2781371

Change-Id: Iabd4abc10cb5d78bde65fb6e86f984797c927d2a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>