DefaultContainerService: implement additional methods

For usage in Settings->Storage

Change-Id: I2d45198cc6ea3b84af1547873380eae2c04c0b93
Profiles: Add a profile picker activity

Patchset 2: Add CM Copyright
Patchset 3+4: Rebase
Patchset 5: Some optimizations

Change-Id: Ic8281e4c6fef6d2f4c56fc01acfe6e54b4c8f51c
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Conflicts:
	core/java/android/app/ProfileManager.java
	core/res/res/values/cm_strings.xml
	core/res/res/values/symbols.xml

 This is the 2nd commit message:

Profiles: Add a profile picker activity --------- remove unused file
Make "SD Card removed" notification dismissible if the removed SD Card is not the primary storage

The Galaxy S uses the "external SD Card" as the extended storage
and it the notification should be dismissible as it's okay not
to have it.

Additionally, this patch also not hide the USB storage mount dialog
if the removed storage is not the primary storage

Adapted for JB 4.2

Change-Id: Ic752a3da917e0d7736a619fb68f07905106987fb

Conflicts:
	packages/SystemUI/src/com/android/systemui/usb/StorageNotification.java
Allow USB notification to show when primary SD allows UMS and MTP

Previously if primary SD is set to allowMassStorage="true" the USB
dialog would never show.  This checks if persist.sys.usb.config is
set to mtp,adb and then allows the USB notification to show. With
this you can then have the option to select from MTP, PTP and Mass
storage when clicking the pull down notification. When Mass Storage
is selected it activates the USB connected dialog to turn on USB
storage. When set back to MTP the USB connected notification disappears.

Change-Id: I2287075ec93cae75f19e8fb59965d9dddb234aca