Read mute state from sink_input.muted.

Change-Id: If29c09aefccffab406fc1ef1f4f01ec24a7fcf37
Add volume context changes; accidentally fix whitespace.

Change-Id: Iab35e42bf076a07978b96829160f528d89f510f5
Fix pa_main_volume_policy lifecycle handling

We should call pa_main_volume_policy_get() only once during module
initialization, and then call pa_main_volume_policy_unref() when the
module is unloaded.

Change-Id: I5c482822dff683a79127812c9948eff711ae9066
pump up version number and update changelog

Change-Id: I46f713e433a2ca8a2b82ca39e71dae5cbfa397de