Settings : Add preference for proximity wake

Change-Id: I2fcbdee3bcf33f8e44b6c5fa29fb1d4d6dcab8e4

Conflicts:
	res/values/slim_strings.xml
Proximity Wake-Up : adjust strings

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

  * Fix up code to compile

Change-Id: Idfa64758a3c6d60ca4801f6f7f34f0429f95cbec
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>