[flexi] Don't run tests for AOD => KeyguardState.Gone on flexi

KeyguardState.GONE is deprecated when the scene container
is enabled. Instead, Scene.Gone is used and transitions
to Scene.Gone is handled in SceneContainerStartable.

Specifically, the legacy KeyguardState.AOD => KeyguardState.GONE
transition is (in STL) Scene.Lockscreen => Scene.Gone
and is handled in SceneContainerStartable#handlePowerState.

Test: atest FromAodTransitionInteractorTest
Flag: TEST_ONLY
Bug: 416716666
Change-Id: Id1785d7890a063378b617dbb4ad848a49c1e9e2d