Fix a bug where surface crashes when the enter animation starts while the exit animation has not yet finished

Bug: 5446482
Change-Id: I2e9f2e91ab5e8b22896d12e08fac76c72c997274

Author: satok16

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

@@ -2578,11 +2578,7 @@ public int relayoutWindow(Session session, IWindow client, int seq,
                     (win.mAppToken == null || !win.mAppToken.clientHidden)) {
                 displayed = !win.isVisibleLw();
                 if (win.mExiting) {
-                    win.mExiting = false;
-                    if (win.mAnimation != null) {
-                        win.mAnimation.cancel();
-                        win.mAnimation = null;
-                    }
+                    win.cancelExitAnimationForNextAnimationLocked();
                 }
                 if (win.mDestroying) {
                     win.mDestroying = false;

services/java/com/android/server/wm/WindowState.java

@@ -596,6 +596,18 @@ public void clearAnimation() {
         }
     }
 
+    // TODO: Fix and call finishExit() instead of cancelExitAnimationForNextAnimationLocked()
+    // for avoiding the code duplication.
+    void cancelExitAnimationForNextAnimationLocked() {
+        if (!mExiting) return;
+        if (mAnimation != null) {
+            mAnimation.cancel();
+            mAnimation = null;
+            destroySurfaceLocked();
+        }
+        mExiting = false;
+    }
+
     Surface createSurfaceLocked() {
         if (mSurface == null) {
             mReportDestroySurface = false;
@@ -1742,4 +1754,4 @@ public String toString() {
         }
         return mStringNameCache;
     }
-}
+}