Settings: persist double tap to wake state

After disabling double tap to wake and rebooting, the state would be
persisted in the device, but it would display incorrect checkbox state.

Fixes JIRA bug BACON-92

Change-Id: Ie99e59872778dcdc3028e1770d97507fd831f515
Signed-off-by: Roman Birg <roman@cyngn.com>
SuperSU header
[2/2] Profile: Remove screen lock mode
[2/2] Profile: Screen timeout
[2/2] Battery light: Add 100% charged level
[2/2] Buttons: Switch to last app
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] Global actions: Mobile data
[2/2] Global actions: Wifi
[2/2] NavBar: Enable with s-pen
[2/2] Low battery warning policy
[2/2] Network traffic indicator
[2/2] Floating window
[2/2] Lockscreen notifications
[2/2] Slim Recents