Add SystemAudioAutoInitiationAction and SystemAudioStatusAction

Once all device discovery action is done if there is audio amplifier
on device list, it should trigger system audio initiation action.
On or off of system audio is decided by Tv's last audio setting
(speaker). If system audio was the last audio setting, it will
try to turn on system audio; otherwise will turn it off.

In other hands, SystemAudioStatusAction is added to update
system audio status (mute or volume) after
SystemAudioAutoInitiationAction. In fact, RequestArcAction has
almost same code as it has and will refactore RequesArcAction
in the following changes.

Change-Id: I3d591242e79549cb73e14546f0d057ba08f878ef