Missing back button on MultiSimSettings ActionBar

Fixed missing back button on ActionBar (default Settings behavior on
submenus) by adding "parentActivityName" property to MultiSimSettings
activity.

Change-Id: I60a1123be29d81c8232e0acee1ac9544bf9b32e6
Merge "Missing back button on MultiSimSettings ActionBar" into cm-11.0
[2/2] Profile: Screen timeout
[2/2] Buttons: Switch to last app
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] Recents clear all button
[2/2] Low battery warning policy
[2/2] Network traffic indicator
[2/2] Lockscreen notifications