Settings: QS performance profiles tile

Requires http://review.cyanogenmod.org/#/c/51776/

Patchset 2: Fix not null comparation
Patchset 3: Added suggestions
Patchset 4: Fix string
Patchset 5: Rebased
Patchset 6: Rebased
            Move setCurrentValue() inside mPerfProfilePref null check

Change-Id: I578d84002b00e0a7c58cdcaf2a3735bf6bbfdabf
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Settings: Add android namespace prefix

Change-Id: Iaeedf6a120ea13d5ddcc62d9081b5b31d13bc05e
Add option to Restart SystemUI to DevSettings

PS2: Fixed the authorship

Change-Id: I14172d3aef32d051b3d5d9ead5a42e4b8d64dd6a
Merge pull request #3 from PAC-man/cm-10.2

Maj