The naming is confusing here. I see that these are all forms of auto focus, and the "auto" property is really a kind of manual autofocus or something...  Maybe just call this focusModeSupport so it doesn't have auto in it?

Also, IMO, all of the underscores in this file are gratuitous. I'd leave them out.

Also, consider making the properties of this support object match the names you use for the focus modes.

Then you could write if (this.focusModeSupport[CONTINUOUS_CAMERA_FOCUS_MODE])

That way you get the benefit of the symbolic constants you defined.