Read later: Fix testAddReadingListItemFromBottomSheet.

testAddReadingListItemFromBottomSheet is failing because
https://chromium-review.googlesource.com/c/chromium/src/+/2562970
is landed before the test is landed.

That CL requires the test to finish() the activity in the test code.
We call it now.

TBR=dtrainor@chromium.org

Bug: 1150161
Change-Id: I51dc8ed4d595614cb4722733461c275d716f77c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570501Reviewed-by: Xing Liu <xingliu@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833161}

chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java

@@ -1649,7 +1649,7 @@ public class BookmarkTest {
         // Click the star button again to launch the edit activity.
         MenuUtils.invokeCustomMenuActionSync(InstrumentationRegistry.getInstrumentation(),
                 mActivityTestRule.getActivity(), R.id.bookmark_this_page_id);
-        waitForEditActivity();
+        waitForEditActivity().finish();
     }
 
     /**