Jelly Bean MR2 bringup

* Add libdumpstate.
* Drop vold.fstab, switch to unified fstab.
* Replace wpa_supplicant.conf with an overlay.
* Lower the volumes a bit.
* Use IOMMU_GPU_SYNC (update kernel cmdline).
* Add Bluetooth LE permission.
* Use caf qcom/media variant.

Change-Id: I1700471826d9f97e397dbebd1ed6aa058ca4af93

Conflicts:

	rootdir/fstab.qcom