Do not modify notification shade plugin state.

This change removes logic from the BouncerSwipeTouchHandler
where the notification shade plugin state was being forced open
on the beginning of a touch session.

Test: atest BouncerSwipeTouchHandlerTest
Flag: ACONFIG com.android.systemui.communal_bouncer_do_not_modify_plugin_open disabled
Fixes: 338252661
Change-Id: I7146d3ffcfd7f0eed71ae2404c0fdf0a6975072c