[automerger skipped] Add visibity for androidx prebuilts. am: 7224d40f76 am: 2aa3c80d96 am: 7aa8e6b7d8 -s ours

am skip reason: Merged-In I9114ea285729d962366230d32f254619edd5ffa5 with SHA-1 91a3cdb215 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/kotlinx.metadata/+/15689900

Change-Id: Iae84d1b78c0d6a537666f6cc8d3363681f8e5355