g3: add wifi scan to prop

Change-Id: I249ba1edf8695db8a76e5ab8b4c1290404edae0f
g3: Give the ethernet feature
audio_policy: set 48k for a2dp
overlay: use config-based tcp buffer sizes

Change-Id: I05249cd35e3e44ee54d49040765e0067067cc70c

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml