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 branch 'kitkat' of https://github.com/AOSPA/android_packages_apps_Settings into kitkat

Conflicts:
	src/com/android/settings/DisplaySettings.java

Change-Id: I1b058750e91bb5e41dd70a7796278e20d5618436
Merge remote-tracking branch 'PA/kitkat' into kitkat-legacy-staging

Conflicts:
	src/com/android/settings/DisplaySettings.java