m7-common: route to MultiMedia1 for VOIP Speaker

Change-Id: I7012c481993755ba02bd6391a2fa8b660fdc29f8
m7-common: use new offmode_charging and images

HTC incorporated charger functionality into offmode_charging and added
1% increment images. This makes offmode charging look much nicer. Also,
bring back detect_key and power_test so that the power button works to
turn-on the device from offmode.

Blobs from m7wlv 5.28.605.2.

Change-Id: Ic87b2307e88636ffdf0d971c49bed87faf7aa378
Merge branch 'cm' into HEAD