Remove full api surface from-text stubs java_api_library modules

The toggle between from-text and from-source stubs are made within
java_sdk_library level stubs, and they no longer depend on the full api
surface java_api_library modules. Therefore, these can be safely
removed.

This change also rename android_*_stubs_current.from-source to
android_*_stubs_current, and remove the full api surface modules that
are currently generated from api.go.

Test: ENABLE_HIDDENAPI_FLAGS=true m
Bug: 327507877
Change-Id: If1f081693c7380e2ed5b5d4a1a7f7365ef1770ca