Wait starting window finished in syncInputTransactions

This CL is attempt to fix the test flakiness happens when invoking
tapOnDisplayCenter on the test activity but the starting window
is still exists.

Use ActivityRecord#hasStartingWindow to check all running activities
to ensure input window transations will wait until the starting
window has finished animating.

Bug: 191996095
Test: atest MultiDisplaySystemDecorationTests#\
      testDisplayPolicyImeHideImeNoSystemDecorations --iterations 100
Change-Id: Ie9ca44a7b4c972fc1393d9ce55a5982a2b62dac7

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -8134,9 +8134,15 @@ public class WindowManagerService extends IWindowManager.Stub
             // This could prevent if there is no container animation, we still have to apply the
             // pending transaction and exit waiting.
             mAnimator.mNotifyWhenNoAnimation = true;
+            boolean animateStarting = false;
             while (timeoutRemaining > 0) {
+                // Waiting until all starting windows has finished animating.
+                animateStarting = mRoot.forAllActivities(a -> {
+                    return a.hasStartingWindow();
+                });
                 boolean isAnimating = mAnimator.isAnimationScheduled()
-                        || mRoot.isAnimating(TRANSITION | CHILDREN, ANIMATION_TYPE_ALL);
+                        || mRoot.isAnimating(TRANSITION | CHILDREN, ANIMATION_TYPE_ALL)
+                        || animateStarting;
                 if (!isAnimating) {
                     break;
                 }
@@ -8152,13 +8158,14 @@ public class WindowManagerService extends IWindowManager.Stub
             WindowContainer animatingContainer;
             animatingContainer = mRoot.getAnimatingContainer(TRANSITION | CHILDREN,
                     ANIMATION_TYPE_ALL);
-            if (mAnimator.isAnimationScheduled() || animatingContainer != null) {
+            if (mAnimator.isAnimationScheduled() || animatingContainer != null || animateStarting) {
                 Slog.w(TAG, "Timed out waiting for animations to complete,"
                         + " animatingContainer=" + animatingContainer
                         + " animationType=" + SurfaceAnimator.animationTypeToString(
                         animatingContainer != null
                                 ? animatingContainer.mSurfaceAnimator.getAnimationType()
-                                : SurfaceAnimator.ANIMATION_TYPE_NONE));
+                                : SurfaceAnimator.ANIMATION_TYPE_NONE)
+                        + " animateStarting=" + animateStarting);
             }
         }
     }