[automerger skipped] Make apex variants of prebuilt apex exported modules...

[automerger skipped] Make apex variants of prebuilt apex exported modules available in make am: c30aea20 -s ours am: a0f2cd23 -s ours

am skip reason: Merged-In I57537d17d4920d37d896ed491c6aaa15302cb25d with SHA-1 c30aea20 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/15027891

Change-Id: Idce727a8d2dba8da4ab2aa1e41280e2962ba5f22