Merge "Add a flag to control Keyguard-started transitions." into main

    purpose: PURPOSE_BUGFIX

  }

}

flag {

  name: "ensure_keyguard_does_transition_starting"

  namespace: "windowing_frontend"

  description: "Ensure that keyguard is the one starting transitions, instead of delegating to Core"

  bug: "364930619"

  is_fixed_read_only: true

}