SystemUI: Set zen mode to no interruptions if silent mode is set

When setting ringer mode to silent and current zen mode is off, zen
mode will become priority interruptions mode. As a result, ringer mode
is set to normal mode in updateZenMode.

Set zen mode to no interruptions when ringer mode is set to silent.

CRs-Fixed: 744813
base: added national roaming for Orange in Austria

http://jira.omnirom.org/browse/OMNI-376

Users of Orange in Autria (MCC 232 MNC 05) which is now a subcompany
of 3AT can roam on 3AT (MNC10) and also on t-mobile (MNC03) for 2G

Change-Id: I593c1bdeea3ef712541b4962369a02b2d7c86c5b

National roaming info for Drei in Austria

3AT roams in T-Mobile AT networks

Change-Id: I915edccf92bcbb088fa25b958eb345c624f61597

core: added national roaming info for Bob in Austria.

Users of Bob in Austria(MCC 232 MNC 11)
  can roam on A1 Austria (MNC 01)

Change-Id: I12dfa3d63643af1026dcfea28a4c9d7acec5f9e9

National roaming info for yesss! in Austria

Change-Id: I930198d3cb311b23752a8c2f54852ebd48d65b86