Adjust keyword ordering for DeferredOnSelectionRunnable

This is to comply with the new presubmit rule which enforces the
following keyword order:
public protected private abstract default static final transient
volatile synchronized native strictfp

Bug: 1003711
Change-Id: I6b2d98814427b9e9c14b8d705a4a8a114aac2c96
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1810018
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697693}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/suggestions/AutocompleteMediator.java

@@ -1065,7 +1065,7 @@ class AutocompleteMediator
         mAutocomplete = controller;
     }
 
-    private static abstract class DeferredOnSelectionRunnable implements Runnable {
+    private abstract static class DeferredOnSelectionRunnable implements Runnable {
         protected final OmniboxSuggestion mSuggestion;
         protected final int mPosition;
         protected boolean mShouldLog;