QuickSettings : Add torch tile

Change-Id: I3d206c95e5da15a0717b500ed30efc69ff28c07d
QuickSettings: Use the new QS drawables for the settings too.

Before it used the old power widget drawables, some of which
look quite different from the ones actually used by QS.

Change-Id: I022b1e3499bb69f0b974e610719778b16a59c543
Port "Power widget: Hide Wi-Fi AP option if it's not supported"

Change-Id: Id3a2748f2b60ecc8dac5fd656e4dfed8af2c056b
QuickSettings : Add Wifi-AP Tile

Patchset 2 : Rebase and WiFi AP Tile fix
Patchset 3 : Remove the tile if not supported by device

Change-Id: I93ddf34f9d0061000e1f3b8baa03f9e17d0fba61
DraggableGridView : Various fixes

This patchset tries to address the following issues :
  - Touch was too sensitive, hard to long click
  - Overscroll/bounce was unecessary
  - Unecessary view updates being invoked every 25ms

Change-Id: I34e02d541a4d4a2299fb609aa600102b127534ff