
Adds root extras and metadata extras to MockMediaLibraryService and MockMediaBrowserCompatService and completed test cases for asserting interoperability with a media1 or Media3 browser. PiperOrigin-RevId: 480854842
Adds root extras and metadata extras to MockMediaLibraryService and MockMediaBrowserCompatService and completed test cases for asserting interoperability with a media1 or Media3 browser. PiperOrigin-RevId: 480854842