Do not propagate WIU/BFSL for MediaController.sendCommand

This call is just for exchanging technical information and
shouldn't be used to grant another app permission to start a
foreground service or gain while-in-use permissions.

Test: Manually verified exploit in b/339637822 is no longer possible
Bug: 339637822
Flag: com.android.media.mediasession.flags.remove_wiu_allowlisting_from_mediacontroller_sendcommand
Change-Id: I548a8178a93d9bf0691aa84113147ac86c1ef0a2