Prevent two pane widget picker code from reaching foldables

Currently, there's a few sections of the code that are intended to only be reached by tablets in landscape mode that can be reached by unfolded foldables. Here, we fix this so it no longer occurs.

Bug: 277102339
Test: Verify widget picker works correctly on tablet
Change-Id: I1f2bc99072aff6d852f9ce658ab00fa33b9e02b5