Network Settings: move APN to common area, both CDMA and GSM use this

Change-Id: I6f01d3eafb65e7bd14e98b0a77461302f7a757d7
Telephony: update number of missed calls in notifications

Change-Id: I67a167340dfa4d8d85535a7d72959555cb930a9c
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>