1. update sound icon when theme changed
2. add built-in dci resources to prevent it become a white icon when changed into theme without dci resources
log: update sound icon when theme changed
remove old v20 code, adjust sound devices widget style
run dbus call in another thread to prevent main thread get into wait.
make deviceList item undrageble, and sound setting clickable.
log:
- tray plugin support load dock plugin as system trays
- move network,sound,power plugins out of tray plugin, keepin them still be plugins
Change-Id: I03463ef55a9abc9823c1b9f7d9c95b00158e63ed
