Add RemoveAndroidCompatAnnotationsJarTransformer to JarJar.

New transformer drops given annotations from classes that jarjar
repackages. Dropped annotation, as of this change, includes
"UnsupportedAppUsage".

Greylisted APIs removed via this change should be safe for rvc, since
they were added after Q aosp.

Bug: 146418363
Test: m, diff hiddenapi-flags.csv
Change-Id: Ic95dce29f81fe9ce80e607150f294d7e105d1abe
4 files changed