Settings: Configure wake on Power, Home or Both [2/2]
Allows users with Home button to specify which buttons to use to wake
device. Options are:

- Power Button only
- Home Button only
- Power or Home Button (default)

Essentially the same as current functionality, but now enables user to
"disable" Wake on Power Button, by selecting "Home Button only".

Note: requires config_home_wakeScreen device overlay:

packages/apps/Settings/res/values/bools.xml

Based on Xposed addon by Daniel Bergløv aka SpazeDog
https://github.com/SpazeDog/xposed-additions

PS 2: change default to Both, refactor

Change-Id: If45e537532d3f877c272e37253de3f70831b67bf