DocsUI: Fix TestRule for Material3 flag to disable the config

When the test requires the flag use_material3 disabled we can allow the
always test to run after updating the config as disabled, because when
the flag is enabled all the required resources is available in the APK.

Bug: 430803032
Test: atest com.android.documentsui.queries.SearchChipViewManagerTest
Flag: com.android.documentsui.flags.use_material3
Change-Id: Ibd5ea19e29f2965b6c0c5121d60a55e3625e3d43