Enforce MediaButtonReceiver extracted component name matches session package name

This change makes sure that the extracted component name in a
MediaButtonReceiverHolder matches the Media Session owner's package
name. This avoids incorrectly routing media button events and potential
security issues.

Bug: 244312001
Bug: 238177121
Test: atest CtsMediaBetterTogetherTestCases
Change-Id: Ifac9cf53889222e31d18c14c1e096ee68c0a346c