Fetch weather image only after setting an icon.

InMemoryImageFetcher invokes callback directly if an image is already in memory.
Make sure that icon does not get overwrlitten by the fallback image.

Bug: 1000393
Change-Id: I19d85c310b414ba65362b88beb194453fc95e19b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1782136
Auto-Submit: Ender <ender@google.com>
Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#693201}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/suggestions/answer/AnswerSuggestionProcessor.java

@@ -82,11 +82,11 @@ public class AnswerSuggestionProcessor implements SuggestionProcessor {
 
     @Override
     public void populateModel(OmniboxSuggestion suggestion, PropertyModel model, int position) {
-        maybeFetchAnswerIcon(suggestion, model);
         SuggestionViewDelegate delegate =
                 mSuggestionHost.createSuggestionViewDelegate(suggestion, position);
 
         setStateForNewSuggestion(model, suggestion, delegate);
+        maybeFetchAnswerIcon(suggestion, model);
     }
 
     @Override