Add test for correct MBR ComponentName resolution

This is a revert revert of ag/20276586 with a modified test app name.

This test checks that a MediaButtonReceiverHolder resolves a
PendingIntent to an appropriate ComponentName that matches the
PendingIntent's creator package.

Bug: 238177121
Bug: 244312001
Test: atest FrameworksServicesTests:MediaButtonReceiverHolderTest
Change-Id: I9a3fb7ad6f91bf38b9a30456911e2ec21f516560