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

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

Change-Id: I61f4dfee2dba1f5558bba36022912f9163d8be18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>