Dedup predicates to check if remote animation target can be created.

The predicates below were used to check if remote animation target could
be created from a WindowContainer.

- WindowContainer#canCreateRemoteAnimationTarget
- WindowContainer#canBeAnimationTarget

The former was used by WM shell transition and the later was used by the
legacy transition. Merged the predicates.

Test: no-op refactoring. Existing tests pass.
Bug: 235601859
Change-Id: I985605b0c1eba22be16a32db6294e9623ea84705

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

@@ -9788,11 +9788,6 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         super.finishSync(outMergedTransaction, cancel);
     }
 
-    @Override
-    boolean canBeAnimationTarget() {
-        return true;
-    }
-
     @Nullable
     Point getMinDimensions() {
         final ActivityInfo.WindowLayout windowLayout = info.windowLayout;

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

@@ -928,7 +928,6 @@ public class AppTransitionController {
                 // TODO(b/213312721): Remove this once ShellTransition is enabled.
                 continue;
             } else if (parent == null || !parent.canCreateRemoteAnimationTarget()
-                    || !parent.canBeAnimationTarget()
                     // We cannot promote the animation on Task's parent when the task is in
                     // clearing task in case the animating get stuck when performing the opening
                     // task that behind it.

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

@@ -1778,7 +1778,9 @@ final class TaskDisplayArea extends DisplayArea<WindowContainer> {
 
     @Override
     boolean canCreateRemoteAnimationTarget() {
-        return true;
+        // In the legacy transition system, promoting animation target from TaskFragment to
+        // TaskDisplayArea prevents running finish animation. See b/194649929.
+        return WindowManagerService.sEnableShellTransitions;
     }
 
     /**

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

@@ -2568,11 +2568,6 @@ class TaskFragment extends WindowContainer<WindowContainer> {
         }
     }
 
-    @Override
-    boolean canBeAnimationTarget() {
-        return true;
-    }
-
     @Override
     boolean fillsParent() {
         // From the perspective of policy, we still want to report that this task fills parent

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

@@ -3141,14 +3141,6 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
         return false;
     }
 
-    /**
-     * {@code true} to indicate that this container can be a candidate of
-     * {@link AppTransitionController#getAnimationTargets(ArraySet, ArraySet, boolean) animation
-     * target}. */
-    boolean canBeAnimationTarget() {
-        return false;
-    }
-
     boolean okToDisplay() {
         final DisplayContent dc = getDisplayContent();
         return dc != null && dc.okToDisplay();

services/tests/wmtests/src/com/android/server/wm/TransitionTests.java

@@ -45,6 +45,7 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assume.assumeFalse;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.eq;
@@ -210,6 +211,8 @@ public class TransitionTests extends WindowTestsBase {
 
     @Test
     public void testCreateInfo_DisplayArea() {
+        assumeTrue(mDisplayContent.mTransitionController.useShellTransitionsRotation());
+
         final Transition transition = createTestTransition(TRANSIT_OPEN);
         ArrayMap<WindowContainer, Transition.ChangeInfo> changes = transition.mChanges;
         ArraySet<WindowContainer> participants = transition.mParticipants;