g2: cleanup and quiet logspam

Conflicts:
	g2.mk
g2: edit some build.props

fix speaker mode when calling
less gpu rendering
g2: disable nfc debugging
hammerhead: configure load dependent update rates

Change-Id: Ic4237b5f025234e4ce5574ee4e5d94df3ac20b7e
Signed-off-by: Dan Trifan <jimsth@gmail.com>

Conflicts:
	rootdir/init.g2.rc