Show owner info creation if no owner is set for UserTile

Forward port from cm-10.2.
Squash of the following commits:

Show owner info creation if no owner is set for UserTile

Change-Id: I43575946023676a1b75b67e1ae1996a0a3a35b88

Fix showing owner info creation from UserTile if no owner is set

* Turns out the default user will always be present, meaning a check of
  user count == 0 fails.

Change-Id: Id8e8e75c5f51c73a60d7b9039298ecb90e572bc9

Show default profile name if no profile exists

Change-Id: I6b651d6b552ab3caf30102d289469eaf68f58a0e

UserTile : Check if profile has a photo

In the event that the profile doesn't have a photo, don't default to the
user's photo, instead show a default avatar.

Change-Id: I80de324ae1e151693cf3716bf87d39a16096ca12

Conflicts:

	packages/SystemUI/src/com/android/systemui/quicksettings/UserTile.java