GuidedStepFragment: continue fix subActions

Last CL didn't consider both subActions Adapter
and actions Adapter share the same GuidedActionStylelist.
When we call setActions on subActions, we shouldn't
collapse subActions.

Bug: 32858270
Test: GuidedStepFragmentTest on API 19 and O/master

Change-Id: Ib6e2a0eafd32c8fb8be6bac5b86bdfa36d9976df
1 file changed