camera: Don't segfault if we get a NULL parameter

 * Values end up NULL on some drivers, don't crash.

Change-Id: Ic897dbd4629cf3af98c85f93be202c382dde806b
[WIP]: camera: add parameters for htc cameras

Change-Id: I1456e5af22d1cb68fd19626a136fef68c5573074
camera: fixup htc params

Change-Id: Iee0086e8a7319ada09f5191092c314c099e0d66a