vcs_stop_auth_session() was called invoking qseecom securefp app without
first calling sensor_init(). That crashes soft-reboot.
Add some more other robustness too and close the fd.
Change-Id: I586139f52d3dc841b8960e1de8c50d596e98d210
* Use a fully OSS FPS stack to remove dependency on a service to
register fingerprints and hacked up touchwiz libs from Samsung
Change-Id: I66ae7fc807a213befdf77d0f09d38f2fbe01df61
