appdistribution: fix flaky test due to race condtion in testing logic: checkForNewRelease_whenCalledMultipleTimes_onlyFetchesReleasesOnce#7241

dconeybe merged 1 commit intomainfirebase/firebase-android-sdk:mainfrom

dconeybe/appdistribution/NewReleaseFetcherTestFlakeFix_checkForNewRelease_whenCalledMultipleTimes_onlyFetchesReleasesOncefirebase/firebase-android-sdk:dconeybe/appdistribution/NewReleaseFetcherTestFlakeFix_checkForNewRelease_whenCalledMultipleTimes_onlyFetchesReleasesOnceCopy head branch name to clipboard