Add additional droiddoc options for stubs-api

There's slightly different for droiddoc options between AOSP and
internal Master. So set droiddoc options to be consistent with current
ones in internal Master.

Test: m android_stubs_current
Bug: b/70351683 b/76179848
Change-Id: I3b87021b8a882e0934faedf51a9f84c996654c1f