SystemUI : QuickSettings Cleanup

Introduce new class to reference from settings and SystemUI to avoid
code duplication.

Differentiate between configuration change vs tile layout modification.

Patchset 2  - Remove whitespace
Patchset 3  - Remove unused ids
Patchset 4  - Better organize the classes
Patchset 5  - Rebase
Patchset 6  - Introduce updateResources()
Patchset 8  - Update tiles to use updateResources()
Patchset 9  - Expand imports
Patchset 10 - Updated all tiles to support updateResources()
              Added dinamic tiles to mQuickSettingsTiles
              Optimized and standarized of calls to updateQuickSettings() from tiles
                 onPostCreate() -> updateTile() -> super.onPostCreate() -> updateQuickSettings()
                 updateResources() -> updateTile() -> super.updateResources() -> updateQuickSettings()
              Rebased
Patchset 11 - Remove unnecessary calls to update Quick Settings

Change-Id: I0baff915b4c3486cc0ac165e3e927399c2b15776