Camera: Don't do cancel_af till all CBs are received in burst shot

Doing cancel_af in the first jpeg CB while
burst shot is going on, is changing the
camera state to IDLE and allowing next
takePicture() which is resulting in crash
as this call reaches HAL when camera is in
picture taking state.

Change-Id: Idd146060a73161bcc30c34756fb53662bb1f0902
CRs-Fixed: 593352
1 file changed