[Sheriff] Disable flaky switcheTabBetweenDifferentPeekModes

TBR=micantox@google.com, mcarlen@chromium.org

Bug: 1123958
Change-Id: Ifea8ffdd73fc0204a2cb8a004378225691ebbcd8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2388149Reviewed-by: Lijin Shen <lazzzis@google.com>
Commit-Queue: Lijin Shen <lazzzis@google.com>
Cr-Commit-Position: refs/heads/master@{#803587}

chrome/android/features/autofill_assistant/javatests/src/org/chromium/chrome/browser/autofill_assistant/AutofillAssistantChromeTabIntegrationTest.java

@@ -342,6 +342,7 @@ public class AutofillAssistantChromeTabIntegrationTest {
 
     @Test
     @MediumTest
+    @DisabledTest(message = "Flaky - https://crbug.com/1123958")
     public void switchTabBetweenDifferentPeekModes() {
         ArrayList<ActionProto> listA = new ArrayList<>();
         listA.add((ActionProto) ActionProto.newBuilder()