Disable flaky test PictureInPictureControllerTest.testEnterPip

TBR= mlamouri@chromium.org

Bug: 1038151
Change-Id: I46a30236c75694c7682cbadedce36c649ad064fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1983448Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727656}

chrome/android/javatests/src/org/chromium/chrome/browser/media/ui/PictureInPictureControllerTest.java

@@ -19,6 +19,7 @@ import org.junit.runner.RunWith;
 
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.DisabledTest;
+import org.chromium.base.test.util.FlakyTest;
 import org.chromium.base.test.util.MinAndroidSdkLevel;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ChromeTabbedActivity;
@@ -94,6 +95,7 @@ public class PictureInPictureControllerTest {
     @Test
     @MediumTest
     @MinAndroidSdkLevel(Build.VERSION_CODES.O)
+    @FlakyTest(message = "see crbug.com/1038151")
     public void testEnterPip() throws Throwable {
         enterFullscreen();
         triggerAutoPiP();