Exclude the embedded tasks from Recents

Currently embedded tasks with activities from other apps are showing
as separate entries in Recents. We should only have a single Recents
entry for the host and embedded apps as per UX definition. This CL
excluded the entry from recents if the task is embedded.

Bug: 194243805
Test: atest RecentTasksTest#testVisibleEmbeddedTask_expectNotVisible
Change-Id: Ie4548ffc0175a1c331f3509fe9ded8c1a1a53196

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

@@ -1346,7 +1346,8 @@ class RecentTasks {
                     + " activityType=" + task.getActivityType()
                     + " windowingMode=" + task.getWindowingMode()
                     + " isAlwaysOnTopWhenVisible=" + task.isAlwaysOnTopWhenVisible()
-                    + " intentFlags=" + task.getBaseIntent().getFlags());
+                    + " intentFlags=" + task.getBaseIntent().getFlags()
+                    + " isEmbedded=" + task.isEmbedded());
         }
 
         switch (task.getActivityType()) {
@@ -1392,6 +1393,11 @@ class RecentTasks {
             return false;
         }
 
+        // Ignore the task if it is a embedded task
+        if (task.isEmbedded()) {
+            return false;
+        }
+
         return true;
     }
 

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

@@ -787,6 +787,19 @@ public class RecentTasksTest extends WindowTestsBase {
         triggerTrimAndAssertTrimmed(mTasks.get(0), mTasks.get(1), mTasks.get(2), mTasks.get(3));
     }
 
+    @Test
+    public void testVisibleEmbeddedTask_expectNotVisible() {
+        Task task = createTaskBuilder(".Task")
+                .setFlags(FLAG_ACTIVITY_NEW_TASK)
+                .build();
+        doReturn(true).when(task).isEmbedded();
+        mRecentTasks.add(task);
+
+        assertThat(mCallbacksRecorder.mAdded).hasSize(1);
+        assertFalse("embedded task should not be visible recents",
+                mRecentTasks.isVisibleRecentTask(task));
+    }
+
     @Test
     public void testFreezeTaskListOrder_reorderExistingTask() {
         // Add some tasks