QS/PW: Check for mobile data instead of telephony permissions (1/2)

For QuickSettings and Power Widget check if there is
ConnectivityManager.TYPE_MOBILE network avaialbe directly instead of relying
on a checking for the PackageManager.FEATURE_TELEPHONY permission.  Some
devices like tilapia (Nexus 7 GSM) has mobile data but does not set the
telephony permission.

Patchset 2:
   	- Use ConnectivityManager.isNetworkSupported() instead of checking for a null
	  value returned from ConnectivityManager.getNetworkInfo(). Thanks
	- Have MobileNetworkTile use the QSUtil deviceSupportsMobileData method

Change-Id: I71bd6217cbe08622f805de4ae30a87df11340f5f
Fixes: CYAN-803
[1/2] Power connect/disconnect notification support

part 1/2: frameworks/base PowerUI and Settings
http://review.cyanogenmod.org/#/c/35241/

part 2/2: packages/apps/Settings Sound settings
http://review.cyanogenmod.org/#/c/35242/

patchset 3:
    shrink a couple of long lines
    remove power_notifications_use_default option (folded into ringtone option)
    load default settings in global instead of system

patchset 5:
    support vibrate toggle
    ignore first power state change (on boot) if it's a DISCONNECT

patchset 6:
    fix ignore first power state change

patchset 7:
    change vibrate to default to off
    simplify first power state change ignore logic

Change-Id: I36a6b9f924d2cd52191a8e83a744745b37c5b068
Merge remote-tracking branch 'cm/cm-10.1' into cm-10.1