Ignore testShowHideInSameFrame on T

ImeOpenCloseStressTest#testShowHideInSameFrame() is very flaky
on T. It's passing on T QPR, and rewritten in U (also passing).

This could be a real bug on Android side as the same test is passing on
T QPR. However, let's just ignore this test as T (not QPR) does not
accept general fix now.

I7a66fd84e4094be249714c2597706ee25938adbe is an unrelated change that's in T QPR to avoid merging this CL there.

Bug: 268556567
Test: m InputMethodStressTest
Change-Id: Ibcd01e0d722f5ebb846e75f72ba4e770f7030d32
Merged-In: I7a66fd84e4094be249714c2597706ee25938adbe

tests/InputMethodStressTest/src/com/android/inputmethod/stresstest/ImeOpenCloseStressTest.java

@@ -42,6 +42,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.platform.app.InstrumentationRegistry;
 
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -123,6 +124,7 @@ public final class ImeOpenCloseStressTest {
         }
     }
 
+    @Ignore("b/268556567")
     @Test
     public void testShowHideInSameFrame() {
         TestActivity activity = TestActivity.start();