Mark flaky AwAutofillTest cases.

TBR: michaelbai@chromium.org
Bug: 1161326
Change-Id: I171327653b383c05509d4d22fe7d8fb9cd855657
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625757Reviewed-by: Sky Malice <skym@chromium.org>
Commit-Queue: Sky Malice <skym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843735}

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

@@ -1973,6 +1973,7 @@ public class AwAutofillTest {
     }
 
     @Test
+    @FlakyTest(message = "https://crbug.com/1161326")
     @SmallTest
     @Feature({"AndroidWebView"})
     @CommandLineFlags.Add({"enable-features=AndroidAutofillQueryServerFieldTypes"})
@@ -1984,6 +1985,7 @@ public class AwAutofillTest {
     }
 
     @Test
+    @FlakyTest(message = "https://crbug.com/1161326")
     @SmallTest
     @Feature({"AndroidWebView"})
     @CommandLineFlags.Add({"enable-features=AndroidAutofillQueryServerFieldTypes"})