[DocsUI, Search]: Fix testBuildQueryArgs_hasWeekAgoTime

The test was flaky (b/156759046) and the fix tried to solve it by
creating before and after timestamps and hope that the actual value is
equal to one of those. However, there is still no guarantee that this
will happen. This fix compares the actual value with the computed value
to within 1 minute (60 * 1000 milliseconds) precision. This is
sufficient when dealing with timestamps that are used to retrieve files
that are up to 1 week (or 604800s) old. The flakiness of the test was
amplified by the missing method error, which was fixed on  ag/34111796.

Bug: 425958961
Test: atest DocumentsUIGoogleTests:com.android.documentsui.queries.SearchViewManagerTest
Flag: com.android.documentsui.flags.use_material3
Change-Id: I6e83c308809059a066c6163882a635c6b2e6199b