klte-common: remove context flags from fstab

* SELinux is not set up right now and this is causing the device to fail
to boot.

Change-Id: Ie2ba7a0c2f652073bdafaf6ab783ef13af54a7fa
Revert "klte-common: change HardwareKeys overlay to 7"

This reverts commit 894ea45af83c1f53d796d8a6fa5f7b936c75c5c0.
klte-common: import common KlteRIL

* Support CDMA and GSM
* Kanged from jflteRIL

Change-Id: I222b33dd879d1c8cdaf24fb550ce835384c49050