usecase validator: narrow down the remapping to game use case

Do not remap media usage to game usage just because a client
is attached to a stream with a fast mixer: the client itself
might be on the normal mixer.
Also do not remap if the content type is speech, sonification
or ultra sound.

Bug: 278412306
Test: atest UsecaseValidatorTest
Change-Id: I3eec04c35f6c57f0b64b959b85d9f7fc7a128d0b