Deflake PinnedStackTests#testPinnedStackWithDockedStack

Bug: 156003518
Test: atest --iteration 5 PinnedStackTests
Change-Id: Ib4bbd2fbb51a61c36ceed83513278b991328c54d
diff --git a/tests/framework/base/windowmanager/src/android/server/wm/PinnedStackTests.java b/tests/framework/base/windowmanager/src/android/server/wm/PinnedStackTests.java
index 042eb48..fc32581 100644
--- a/tests/framework/base/windowmanager/src/android/server/wm/PinnedStackTests.java
+++ b/tests/framework/base/windowmanager/src/android/server/wm/PinnedStackTests.java
@@ -1046,7 +1046,6 @@
         assertEquals("onPause", 0, lifecycleCounts.getCount(ActivityCallback.ON_PAUSE));
     }
 
-    @FlakyTest(bugId = 156003518)
     @Test
     public void testPinnedStackWithDockedStack() throws Exception {
         assumeTrue(supportsSplitScreenMultiWindow());