Set themes to install internal only

Themes should not be moveable to sdcard. Before this patch the new
style themes installed with forward lock would fail.

Change-Id: Iea50f5526b1c2c56a825757eac5bf4bb01b4686d
rename the custom lockscreen state action

Change-Id: I4ffadda9392e8ca8765e5b8ca47994e3a9990792

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Automatic translation import

Change-Id: I7bd7a7bb8a87f741fbee89ff163f0419f2e8f9b6
Add wallpaper pickers to seperate package [1/2]

Currently wallpaper pickers were part of the various launchers
and we were relying on Trebuchet's to add code for including
wallpapers from themes.  If Trebuchet is removed then this
functionality is lost.  This package is already included in all
builds so making the picker available here removes the dependency
on a specific launcher.

Trebuchet still contains a picker which should probably be removed
and make use of this package instead.

Change-Id: Ie42ae0e01f951a8293d13d6c8a73fde0dea6682b