Mark WindowContextTest as flaky

Test: build & run
Bug: 150251036
Change-Id: I5590481e4fb3648b83198b3570acea683ca904dd
diff --git a/tests/framework/base/windowmanager/src/android/server/wm/WindowContextTests.java b/tests/framework/base/windowmanager/src/android/server/wm/WindowContextTests.java
index e9bebce..573fc80 100644
--- a/tests/framework/base/windowmanager/src/android/server/wm/WindowContextTests.java
+++ b/tests/framework/base/windowmanager/src/android/server/wm/WindowContextTests.java
@@ -29,6 +29,7 @@
 import android.view.View;
 import android.view.WindowManager;
 
+import androidx.test.filters.FlakyTest;
 import androidx.test.platform.app.InstrumentationRegistry;
 
 import org.junit.Test;
@@ -40,6 +41,7 @@
     private DisplayManager mDisplayManager = mContext.getSystemService(DisplayManager.class);
 
     @Test
+    @FlakyTest(bugId = 150251036)
     public void testWindowContextConfigChanges() {
         final WindowManagerState.DisplayContent display =  createManagedVirtualDisplaySession()
                 .setSimulateDisplay(true).createDisplay();