An app must only have a single service in the manifest that is either
exposing `MediaLibraryService.SERVICE_INTERFACE` or
`MediaSessionService.SERVICE_INTERFACE`. Hence the component name found by
querying the package manager for a service never returns a different result
when queried again.
The static `MediaSessionImpl.serviceComponentName` can hence be removed
and the package manager queried again when a second session instance
is created.
#minor-release
PiperOrigin-RevId: 531210456
1ca9e0024b