Enable interruptions in Communal

This CL enables the enableInterruptions flag in the STLState used by
Communal. This flag is already enabled by default in STLState and is
going to be removed soon.

This CL shouldn't have any effect on Communal given that Communal has
only 2 scenes.

Bug: 371951148
Test: Manual, swiped from lockscreen to communal, entered edit mode,
 went back to communal then swiped back to lockscreen.
Flag: NONE this flag should not affect communal given that it has only 2
 scenes.
Change-Id: Ie3d0f2c09847d3d63f959a6007fd8f2c8c0da81c