Dialer : Fix T9 add to contacts

Use activity context rather than application
QuickContactBadge can only function with an activity context,
in its current state, it crashes with :

E/AndroidRuntime(12944): FATAL EXCEPTION: main
E/AndroidRuntime(12944): android.util.AndroidRuntimeException:
Calling startActivity() from outside of an Activity  context requires
the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

Patchset 2 : only use activity context for adapter

Patchset 3: Get rid of mContext variable and rearrange parameters

Change-Id: If6dec5a5e12e7006637331861e8d3d4275c31cd0