Pie controls: Fix multi-user handling (2/2)

Move pie controls out of the navigation bar category when
the secondary user is logged in. This allows the seconday user
to configure pie controls.

See frameworks/base commit for more information.

Change-Id: Ice0009c74243a50688c338236a83be6fef70115b
Merge "Pie controls: Fix multi-user handling (2/2)" into cm-10.1-staging