Ignore overriding pending animaiton for unlock transition.

System app can request to override app transition animation using
the following hidden APIs.

- IWindowManager#overridePendingAppTransitionRemote
- Activity#registerRemoteAnimations
- IActivityTaskManager#registerRemoteAnimationsForDisplay

We usually give the lowest priority for the overrides registered by
the last API, since it defines default transition animaiton for a given
transition type and others are used to overide more specific cases.

However remote animation for unlock transition is also used to sync
keyguard status between server_process and system ui, even system app
must not override it.

Bug: 231556392
Test: manual
  1. Press Power button to display the lock screen.
  2. Press Power button and the volume down button at the same time to
     take a screenshot.
  3. Tap the screenshot preview that appears in the lower left corner
     of the screen.
  4. Execute Fingerprint authentication to unlock the screen.
Change-Id: I16593c1aa7e7799e355aafbe47832e5c3b23c0cc

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

@@ -113,7 +113,6 @@ public class AppTransitionController {
     private final DisplayContent mDisplayContent;
     private final WallpaperController mWallpaperControllerLocked;
     private RemoteAnimationDefinition mRemoteAnimationDefinition = null;
-    private static final int KEYGUARD_GOING_AWAY_ANIMATION_DURATION = 400;
 
     private static final int TYPE_NONE = 0;
     private static final int TYPE_ACTIVITY = 1;
@@ -716,14 +715,17 @@ public class AppTransitionController {
      */
     private void overrideWithRemoteAnimationIfSet(@Nullable ActivityRecord animLpActivity,
             @TransitionOldType int transit, ArraySet<Integer> activityTypes) {
+        RemoteAnimationAdapter adapter = null;
         if (transit == TRANSIT_OLD_CRASHING_ACTIVITY_CLOSE) {
             // The crash transition has higher priority than any involved remote animations.
-            return;
+        } else if (AppTransition.isKeyguardGoingAwayTransitOld(transit)) {
+            adapter = mRemoteAnimationDefinition != null
+                    ? mRemoteAnimationDefinition.getAdapter(transit, activityTypes)
+                    : null;
+        } else if (mDisplayContent.mAppTransition.getRemoteAnimationController() == null) {
+            adapter = getRemoteAnimationOverride(animLpActivity, transit, activityTypes);
         }
-        final RemoteAnimationAdapter adapter =
-                getRemoteAnimationOverride(animLpActivity, transit, activityTypes);
-        if (adapter != null
-                && mDisplayContent.mAppTransition.getRemoteAnimationController() == null) {
+        if (adapter != null) {
             mDisplayContent.mAppTransition.overridePendingAppTransitionRemote(adapter);
         }
     }