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>
Settings : Add preference for proximity wake

Change-Id: I2fcbdee3bcf33f8e44b6c5fa29fb1d4d6dcab8e4
Proximity Wake-Up : adjust strings

Change-Id: I605a11b5bd7150b2a456d5c355af49fd7047e173
Settings : Make proximity opt-in

Change-Id: Idfa64758a3c6d60ca4801f6f7f34f0429f95cbec