Hypothetically fix test flake

I can't repro the flake, but hardcode the times in case that helps

Test: atest RankingHelperTest#testSortByRecencyNotIntrusiveness  --rerun-until-failure 50
Bug: 332155790
Change-Id: Iecc57e887d757612246f43dfd6933a0e4a0735cd
1 file changed