Sorry but this is what they did, i just added two words where the device "says" 'I support proximity wake up', nothing else.
BTW I think that pressing power button several times to wake up even if system "locks" it is useful.
Flash another gappa package, maybe voice.apk has some bugs
Btw can u try this for wake up:
Place the phone on a table, press power button, for me (the first time) it doesn't wake up
Rotate your phone 180° then lock it (this is the position it has when in pocket) then cover with a finger the proximity sensor, press only one time power button, it won't wake, if u try to press power button again, it will wake up