DocsUI M3: Fix crash on desktop

A new resource ID was only added in the values folder with qualifier,
which means it was missing when the qualifier didn't match, it was added
in ag/34116130.

Fix by declaring the resource in the base values.

Bug: 425591387
Test: com.android.documentsui.SearchViewUiTest
Flag: com.android.documentsui.flags.use_material3
Change-Id: I710697372a0e724ba5876edf6294402bec82ba10