qcom-common: use qcom powerhal

Change-Id: Ibe11e07bfee540b7594ffac1ad6ec263b7d57c15
camera: add a workaround for slow camera startup

* On certain devices, the first camera initialisation
  takes long, and fails sometimes.
* Add an app that opens and cloeses the camera on boot,
  so that when the user opens a camera app, it has
  already been initialised and will work.

Signed-off-by: Chirayu Desai <cdesai@cyanogenmod.org>
Change-Id: I0623a0777ad83741c1c36355dffa8adf3a510df3
Merge changes I0623a077,Ibe11e07b into kitkat

* changes:
  camera: add a workaround for slow camera startup
  qcom-common: use qcom powerhal