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
Merged-In: Ic95dce29f81fe9ce80e607150f294d7e105d1abe
Exempt-From-Owner-Approval: cherrypick from aosp
(cherry picked from commit 0ecdee5310522cd1b04d2241b612aa9a5c100167)
4 files changed