Add test for correct MBR ComponentName resolution

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

Bug: 238177121
Test: atest FrameworksServicesTests:MediaButtonReceiverHolderTest
Change-Id: I930679c43c95633bee3a499a6d87ebeebb33b473
9 files changed