Implement deviceLockQuery and chargeSourceQuery API methods

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
Provide proper response when subscribing to events

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
Implement pin1StatusQuery service API method

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
ofono: implement pin2StatusQuery API method

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
Implement fdnStatusQuery API method

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
ofono: implement fdnStatusQuery API method

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>