g2: fix audio distortion at high volumes

will apply proper authorship once the original author provides me with his
email address

Change-Id: If63cd384c67efeaa60f5f07f98213c128b853a94
g2: up call speaker volume

because it's just horribly low right now

Change-Id: I5edde3fafcd2e3310e76512bb74a9f5967c09596