Fix dump when mute state not set

When mute state is not set the invalid value stored in
AudioPlaybackConfiguration is -1. This has a bitmask of 0x111.. and
previously returned true for all mute reasons.

Changed the dump of the mute state to print only the attributes
that lead to the muting of the track.

Test: dumpsys audio
Bug: 235521198
Change-Id: I741927ff14c12c2efd550f3fe61551d20239f8c0