Fix NullPointerException in ProximitySensor initialization

Update the sensor status after all vars initialized

Change-Id: I576a15f0db5c3cba82dcca28a72c44a4b75b361f
Enable home location feature

Check whether home location provider exist and if yes, query the location.

Change-Id: I8c08613a2f730d3d2ca3c8078bf87f1226218785