Update KQS recents apps and desktop mode launching UX

- Updated recent apps KQS task view
- Added a desktop mode KQS task view
- Did some code cleanup to support this more cleanly

Flag: EXEMPT ENABLE_KEYBOARD_QUICK_SWITCH
Fixes: 357512178
Test: Used KQS with and without desktop mode; opened recent apps and desktop mode
Change-Id: Ib47a8a7f41b56af1ba9d0cbec65ababf8aad7881

quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java

@@ -66,6 +66,9 @@ public final class KeyboardQuickSwitchController implements
 
     @Nullable private KeyboardQuickSwitchViewController mQuickSwitchViewController;
 
+    private boolean mHasDesktopTask = false;
+    private boolean mWasDesktopTaskFilteredOut = false;
+
     /** Initialize the controller. */
     public void init(@NonNull TaskbarControllers controllers) {
         mControllers = controllers;
@@ -126,11 +129,15 @@ public final class KeyboardQuickSwitchController implements
                     /* updateTasks= */ false,
                     currentFocusedIndex == -1 && !mControllerCallbacks.isFirstTaskRunning()
                             ? 0 : currentFocusedIndex,
-                    onDesktop);
+                    onDesktop,
+                    mHasDesktopTask,
+                    mWasDesktopTaskFilteredOut);
             return;
         }
 
         mTaskListChangeId = mModel.getTasks((tasks) -> {
+            mHasDesktopTask = false;
+            mWasDesktopTaskFilteredOut = false;
             if (onDesktop) {
                 processLoadedTasksOnDesktop(tasks);
             } else {
@@ -144,7 +151,9 @@ public final class KeyboardQuickSwitchController implements
                     /* updateTasks= */ true,
                     currentFocusedIndex == -1 && !mControllerCallbacks.isFirstTaskRunning()
                             ? 0 : currentFocusedIndex,
-                    onDesktop);
+                    onDesktop,
+                    mHasDesktopTask,
+                    mWasDesktopTaskFilteredOut);
         });
     }
 
@@ -152,9 +161,22 @@ public final class KeyboardQuickSwitchController implements
         // Only store MAX_TASK tasks, from most to least recent
         Collections.reverse(tasks);
         mTasks = tasks.stream()
+                .filter(task -> !(task instanceof DesktopTask))
                 .limit(MAX_TASKS)
                 .collect(Collectors.toList());
-        mNumHiddenTasks = Math.max(0, tasks.size() - MAX_TASKS);
+
+        for (int i = 0; i < tasks.size(); i++) {
+            if (tasks.get(i) instanceof DesktopTask) {
+                mHasDesktopTask = true;
+                if (i < mTasks.size()) {
+                    mWasDesktopTaskFilteredOut = true;
+                }
+                break;
+            }
+        }
+
+        mNumHiddenTasks = Math.max(0,
+                tasks.size() - (mWasDesktopTaskFilteredOut ? 1 : 0) - MAX_TASKS);
     }
 
     private void processLoadedTasksOnDesktop(List<GroupTask> tasks) {
@@ -214,6 +236,8 @@ public final class KeyboardQuickSwitchController implements
         pw.println(prefix + "\tisOpen=" + (mQuickSwitchViewController != null));
         pw.println(prefix + "\tmNumHiddenTasks=" + mNumHiddenTasks);
         pw.println(prefix + "\tmTaskListChangeId=" + mTaskListChangeId);
+        pw.println(prefix + "\tmHasDesktopTask=" + mHasDesktopTask);
+        pw.println(prefix + "\tmWasDesktopTaskFilteredOut=" + mWasDesktopTaskFilteredOut);
         pw.println(prefix + "\tmTasks=[");
         for (GroupTask task : mTasks) {
             Task task1 = task.task1;
@@ -235,10 +259,6 @@ public final class KeyboardQuickSwitchController implements
 
     class ControllerCallbacks {
 
-        int getTaskCount() {
-            return mTasks.size() + (mNumHiddenTasks == 0 ? 0 : 1);
-        }
-
         @Nullable
         GroupTask getTaskAt(int index) {
             return index < 0 || index >= mTasks.size() ? null : mTasks.get(index);