Ensure Compose-specific TEST_MAPPING is not removed on updates

Adding these tests in ag/20311162

Bug: 257292433
Change-Id: I19102a21b47c7b1f5d90589e7b4b3a7f652257e0
Test: ./update_prebuilts.py -x 9186669 --include androidx/compose --exclude androidx/compose/compiler/compiler-hosted
1 file changed