Exclude more coverage check which can't be covered by this module

Exclude more coverage check which can't be covered by this module

As following errors can't be covered by audio-io testcase itself, exclude from coverage scope
- pthread mutex errors
- sound_manager errors
- pulseaudio errors except policy restriction
- constructors which is not in use

Change-Id: I58d02dc65c16419b2c7eee95670f169327093109