- DockSettings: Integrate into Settings right panel

 + Add PointerSpeed settings
 + Add KeyOverride Settings too

Change-Id: I75363cfd2ad7f0de60e6c430721a1f4ab94b6578
Add ChangeLog in Settings => About tablet

Change-Id: I8148244dd6de1d7f65cff148eced6a4a18f1d29d