ril: track multiple call states

Track multiple active calls so that we don't reset the
CPATH when there is active call on hold. This fixes issue
with lost audio when switching between calls.

Change-Id: Ib4c6d5fed96c48f0f2a7b7fba70b286fcf472619
audio: build hdmi audio hal

Change-Id: I439ac71a45bdd812f5bfa5e62cf36a55de87257e
Merge branch 'cm-11.0' into kk_mkt