SystemUI: Fix multiple issues with hiding unprovisioned SIMs

* Use View.GONE instead of View.INVISIBLE when setting
  dot and mobile group's visibility so that we don't
  leave empty space.
* Always fallback to STATE_HIDDEN when SIM is unprovisioned
  so that we don't end up showing unnecessary empty icon
  after toggling airplane mode twice with mobile data off.
* Make sure to call IconController.setMobileIcons() after
  provisioning changes so that signal icon is always hidden.

Change-Id: I546a326eb52b0496f5fbd9057d368b1a90827d58