[1/2] Base: On-The-Go: Hide on devices without camera

Hide camera switching for devices without front camera as well
if we dont have a front camera, open the first camera we have.
also hide the options from the dialog.

Change-Id: Ic74579708dc4ff030cca97f1f5972dce105431d8

Conflicts:

	core/java/com/android/internal/util/nameless/NamelessUtils.java