Storage Settings: Allow user to trigger a volume rescan

This change allows to trigger a rescan of a volume with the next restrictions:
- Internal volumes if they are emulates
- Primary volumes
- Non-Removable volumes

Ported from: http://review.cyanogenmod.org/44586

Change-Id: I7e75a324938d8081fd715f702d50f1fdceabd96d

Conflicts:
	res/values/cm_strings.xml
Settings: Add some more entries into 'SMS message limit' menu

Add None, 5 and 10 entries into 'SMS message limit' menu.

Change-Id: I8b206ae6c9f73378da65b09e68898de31439cc59

Conflicts:
	res/values/cm_strings.xml
	src/com/android/settings/SecuritySettings.java
Settings: fix string mismatch in updateSmsSummary
Settings: Integrate Voice+ into Settings (1/2)

Change-Id: I4778443c219cd29a463e9c4dab60783dca251f0f
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:
	res/values/cm_strings.xml
Settings: add isPackageInstalled method to Utils