[Android WebAPK Testing] Make WebappDataStorageTest closer to prod

This CL removes the
WebappDataStorage#updateTimeOfLastCheckForUpdatedWebManifest() call in
WebappDataStorageTest to make the test more representative of prod after
https://chromium-review.googlesource.com/c/chromium/src/+/936602/

BUG=None

Change-Id: I369aa2aede781915c669f8faf1ec31536a5e13b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2126468
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Glenn Hartmann <hartmanng@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755143}

chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java

@@ -322,26 +322,17 @@ public class WebappDataStorageTest {
     }
 
     /**
-     * Test that if there was no previous WebAPK update attempt that the is-update-needed check is
-     * done after the usual delay (instead of the longer relaxed-update delay).
+     * Test that the is-update-needed check is done the first time that the user launches the WebAPK
+     * after clearing Chrome's storage.
      */
     @Test
-    public void testRegularCheckIntervalIfNoPriorWebApkUpdate() {
-        assertTrue(WebappDataStorage.RELAXED_UPDATE_INTERVAL > WebappDataStorage.UPDATE_INTERVAL);
-
+    public void testCheckUpdateAfterClearChromeStorage() {
         WebappDataStorage storage = getStorage();
-
-        assertFalse(storage.shouldCheckForUpdate());
-        mClockRule.advance(WebappDataStorage.UPDATE_INTERVAL);
         assertTrue(storage.shouldCheckForUpdate());
     }
 
     private WebappDataStorage getStorage() {
-        WebappDataStorage storage = WebappDataStorage.open("test");
-
-        // Done when WebAPK is registered in {@link WebApkActivity}.
-        storage.updateTimeOfLastCheckForUpdatedWebManifest();
-        return storage;
+        return WebappDataStorage.open("test");
     }
 
     private static Bitmap createBitmap() {