Keyguard: fix statusbar lags when default widget shown.

When statusbar became expanded KeyguardStatusView receives
onKeyguardVisibilityChanged callback and refreshes ClockView.
Because it receives more than one call and every time it reads
new values from resources it cause lags in opening statusbar panel.

Replace this code with BroadcastReceiver and ContentObserver to
refresh it only in case something was changed.

Change-Id: If0dbc1db059536806852661931cb2e6436f2acf4
core: added national roaming info for Free Mobile in France

  Users of Free Mobile in France (MCC 208 MNC 15)
  can roam on Orange (MNC 01)

Change-Id: I2c0c3940a72262b1257fb1c2dfdd01da652d2959
Telephony: Add data rat constant

This event constant is used in DcTracker

Change-Id: I1f9b34a8689c43c2586e9e3a92f0453649775d73
(cherry picked from commit f7ca98035479b670ff51bc9298fd7928a5e0f80d)
(cherry picked from commit f4d8f7b8fa390302b9cc51a5640e017ff393dfcc)
(cherry picked from commit 77d810390fbca8cb1d10bce148035fada414e0eb)
National roaming info for Drei in Austria

3AT roams in T-Mobile AT networks

Change-Id: I915edccf92bcbb088fa25b958eb345c624f61597
National roaming info for yesss! in Austria

Change-Id: I930198d3cb311b23752a8c2f54852ebd48d65b86
National roaming info for 3 in Ireland

Change-Id: I451831f4144b72feac1a38ef1e8693cb947d6d7e
KeyguardServiceDelegate: disable DEBUG

Change-Id: Ia5476563f6ed7f9e3175233994676c038b3a8f67