d2: fix VOIP

Change-Id: I4cac05a4c43ab2011d96aa15de876e2dba75dacf
camera: enable exposure hack

Change-Id: I86d5e430a87da8b0649e193dbcabe659b01cdc42
Merge changes I86d5e430,I4cac05a4 into kitkat

* changes:
  camera: enable exposure hack
  d2: fix VOIP