SystemUI: Allow skipping mirroring confirmation dialog

* As of Android 14, when a user hooks up to an external
  display android asks if you are okay with mirroring your
  screen.
* But on some devices that dock, the internal display is
  physically inaccessible, turns off when docked, or the
  "external" display is effectively the primary (devkits).
  Which makes it impossible or very difficult to click to
  allow mirroring.
* So this just allows those devices to opt-in to bypass
  the prompt.

Co-authored-by: Nolen Johnson <johnsonnolen@gmail.com>
Change-Id: I711a6fb6c471cbc0774bbd06debf306d6f12e31a