Base: Add Service to perform Hotword recognition [DO NOT MERGE]

build fine, and works too, but using a private app for now
we can use Google Now API too, but need some modification :)

for now, im using this to ActiveDisplay
so when Hotword is detect, device will wake up

NOTE: ATTENTION: DANGEROUS:
since this use a Microphone, so this will drain battery
if not implement carefully ;)

Change-Id: I6958d4f10384422cc853b532e163476dabf046eb

Conflicts:
	core/res/res/values/custom_strings.xml