Prevent force showing system bars for TaskView

Update the condition of force showing system bars to check adjacent
tasks instead of checking multi-window windowing mode so it can
distinguish from TaskView.

Bug: 273495037
Test: atest TaskDisplayAreaTests DisplayPolicyTests InsetsPolicyTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:2bd0fe76a6b4ef566386e1949e4db0cf0db16430)
Merged-In: I1c51c6f66cd6967651068de1ffc2e6e8566f5a46
Change-Id: I1c51c6f66cd6967651068de1ffc2e6e8566f5a46

Author: Jerry Chang

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

@@ -17,7 +17,6 @@
 package com.android.server.wm;
 
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
-import static android.app.WindowConfiguration.WINDOWING_MODE_MULTI_WINDOW;
 import static android.view.Display.TYPE_INTERNAL;
 import static android.view.InsetsState.ITYPE_BOTTOM_MANDATORY_GESTURES;
 import static android.view.InsetsState.ITYPE_BOTTOM_TAPPABLE_ELEMENT;
@@ -2382,16 +2381,16 @@ int updateLightNavigationBarLw(int appearance, WindowState navColorWin) {
 
     private int updateSystemBarsLw(WindowState win, int disableFlags) {
         final TaskDisplayArea defaultTaskDisplayArea = mDisplayContent.getDefaultTaskDisplayArea();
-        final boolean multiWindowTaskVisible =
+        final boolean adjacentTasksVisible =
                 defaultTaskDisplayArea.getRootTask(task -> task.isVisible()
-                        && task.getTopLeafTask().getWindowingMode() == WINDOWING_MODE_MULTI_WINDOW)
+                        && task.getAdjacentTask() != null)
                         != null;
         final boolean freeformRootTaskVisible =
                 defaultTaskDisplayArea.isRootTaskVisible(WINDOWING_MODE_FREEFORM);
 
         // We need to force showing system bars when the multi-window or freeform root task is
         // visible.
-        mForceShowSystemBars = multiWindowTaskVisible || freeformRootTaskVisible;
+        mForceShowSystemBars = adjacentTasksVisible || freeformRootTaskVisible;
         // We need to force the consumption of the system bars if they are force shown or if they
         // are controlled by a remote insets controller.
         mForceConsumeSystemBars = mForceShowSystemBars
@@ -2412,7 +2411,7 @@ private int updateSystemBarsLw(WindowState win, int disableFlags) {
 
         int appearance = APPEARANCE_OPAQUE_NAVIGATION_BARS | APPEARANCE_OPAQUE_STATUS_BARS;
         appearance = configureStatusBarOpacity(appearance);
-        appearance = configureNavBarOpacity(appearance, multiWindowTaskVisible,
+        appearance = configureNavBarOpacity(appearance, adjacentTasksVisible,
                 freeformRootTaskVisible);
 
         final boolean requestHideNavBar = !win.getRequestedVisibility(ITYPE_NAVIGATION_BAR);

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

@@ -2385,6 +2385,22 @@ Task getCreatedByOrganizerTask() {
         return parentTask == null ? null : parentTask.getCreatedByOrganizerTask();
     }
 
+    /** @return the first adjacent task of this task or its parent. */
+    @Nullable
+    Task getAdjacentTask() {
+        final TaskFragment adjacentTaskFragment = getAdjacentTaskFragment();
+        if (adjacentTaskFragment != null && adjacentTaskFragment.asTask() != null) {
+            return adjacentTaskFragment.asTask();
+        }
+
+        final WindowContainer parent = getParent();
+        if (parent == null || parent.asTask() == null) {
+            return null;
+        }
+
+        return parent.asTask().getAdjacentTask();
+    }
+
     // TODO(task-merge): Figure out what's the right thing to do for places that used it.
     boolean isRootTask() {
         return getRootTask() == this;

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

@@ -81,12 +81,14 @@ public void testControlsForDispatch_regular() {
     }
 
     @Test
-    public void testControlsForDispatch_multiWindowTaskVisible() {
+    public void testControlsForDispatch_adjacentTasksVisible() {
         addWindow(TYPE_STATUS_BAR, "statusBar");
         addWindow(TYPE_NAVIGATION_BAR, "navBar");
 
-        final WindowState win = createWindow(null, WINDOWING_MODE_MULTI_WINDOW,
-                ACTIVITY_TYPE_STANDARD, TYPE_APPLICATION, mDisplayContent, "app");
+        final Task task1 = createTask(mDisplayContent);
+        final Task task2 = createTask(mDisplayContent);
+        task1.setAdjacentTaskFragment(task2);
+        final WindowState win = createAppWindow(task1, WINDOWING_MODE_MULTI_WINDOW, "app");
         final InsetsSourceControl[] controls = addWindowAndGetControlsForDispatch(win);
 
         // The app must not control any system bars.