[automerger skipped] DO NOT MERGE:Make CarUiInstaller#register public am: ed4351547d -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Car/libs/+/1846435

Change-Id: Icc9903264a9ae94143f53ac099debfe03d8fc6ae