Add API to desktop mode to bring a desktop task to front

Allows launcher to move a desktop task to top.

Bug: 280468885
Test: atest DesktopTasksControllerTest
Change-Id: I417612fa8d262352cf372895e059ac81a9771f8a

libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopModeController.java

@@ -499,6 +499,11 @@ public class DesktopModeController implements RemoteCallable<DesktopModeControll
                     controller -> controller.showDesktopApps(displayId));
         }
 
+        @Override
+        public void showDesktopApp(int taskId) throws RemoteException {
+            // TODO
+        }
+
         @Override
         public int getVisibleTaskCount(int displayId) throws RemoteException {
             int[] result = new int[1];

libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt

@@ -276,6 +276,11 @@ class DesktopTasksController(
         }
     }
 
+    /** Move a task to the front */
+    fun moveTaskToFront(taskId: Int) {
+        shellTaskOrganizer.getRunningTaskInfo(taskId)?.let { task -> moveTaskToFront(task) }
+    }
+
     /** Move a task to the front */
     fun moveTaskToFront(taskInfo: RunningTaskInfo) {
         KtProtoLog.v(
@@ -772,6 +777,13 @@ class DesktopTasksController(
             ) { c -> c.hideStashedDesktopApps(displayId) }
         }
 
+        override fun showDesktopApp(taskId: Int) {
+            ExecutorUtils.executeRemoteCallWithTaskPermission(
+                    controller,
+                    "showDesktopApp"
+            ) { c -> c.moveTaskToFront(taskId) }
+        }
+
         override fun getVisibleTaskCount(displayId: Int): Int {
             val result = IntArray(1)
             ExecutorUtils.executeRemoteCallWithTaskPermission(

libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/IDesktopMode.aidl

@@ -32,6 +32,9 @@ interface IDesktopMode {
     /** Hide apps that may be stashed */
     void hideStashedDesktopApps(int displayId);
 
+    /** Bring task with the given id to front */
+    oneway void showDesktopApp(int taskId);
+
     /** Get count of visible desktop tasks on the given display */
     int getVisibleTaskCount(int displayId);
 

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt

@@ -344,6 +344,18 @@ class DesktopTasksControllerTest : ShellTestCase() {
         }
     }
 
+    @Test
+    fun moveTaskToFront_postsWctWithReorderOp() {
+        val task1 = setUpFreeformTask()
+        val task2 = setUpFreeformTask()
+
+        controller.moveTaskToFront(task1)
+
+        val wct = getLatestWct(expectTransition = TRANSIT_TO_FRONT)
+        assertThat(wct.hierarchyOps).hasSize(1)
+        wct.assertReorderAt(index = 0, task1)
+    }
+
     @Test
     fun moveToNextDisplay_noOtherDisplays() {
         whenever(rootTaskDisplayAreaOrganizer.displayIds).thenReturn(intArrayOf(DEFAULT_DISPLAY))