bin/audio_test.py: Fix the "Unable to control recording volume..." bug
Fix:
1. Remove the method parameter from PAVolumeController.__init__():
Assum PAVolumeController class only be used in this audio_test.py.
2. Don't check the return value of self.method(command):
In PAVolumeController._pactl_output(), when failed to execute the pactl command the exception will be thrown.
3. When pactl command fail (after retry 3 times), let audio_test stop.
Original issue:
In PAVolumeController class:
In set_volume() and mute(), the self.method(command) returns a zero-length string.
So, the set_volume() and mute() always return False. Then, in get_volume(), the self._volume always won't be set.
This is the root cause of the "Unable to control recording volume..."
issue.
More detail:
1. There is no ouptu from the `pactl set-souerce-volume ...` command.
2. The PAVolumeController._pactl_output fucntion will return
subprocess.check_output(). The subprocess.check_output function return the output of "command".
To let the test plan 'after-suspend-reference-cert-automated' and
'after-suspend-reference-cert-blockers' can run fully automatically, do
the following changes:
1. Create the _auto jobs for 'network_after_suspend'and
'bluetooth_detect_after_suspend'
2. Use the jobs which depends 'suspend_adavanced_auto' in the test plans
