Disable flaky AwImeTest test

Bug: 990208
TBR=boliu@chromium.org

Change-Id: If2222cf76edf31860fcc1f4271c2c85a082d1088
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1734006
Commit-Queue: Changwan Ryu <changwan@chromium.org>
Auto-Submit: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683748}

android_webview/javatests/src/org/chromium/android_webview/test/AwImeTest.java

@@ -254,8 +254,10 @@ public class AwImeTest {
     }
 
     // https://crbug.com/920061
+    // Flaky! - https://crbug.com/990208
     @Test
     @SmallTest
+    @DisabledTest
     public void testFocusAndViewSizeChangeCausesScroll() throws Throwable {
         loadBottomInputHtml();
         Rect currentRect = new Rect();