tablet: Enable desktop windowing mode

* This replaces the old freeform window management

Change-Id: I8711af4d90662252a37bc717590d35651460ad25

release/aconfig/ap4a/Android.bp

@@ -17,5 +17,6 @@ aconfig_value_set {
     name: "aconfig_value_set-lineage-ap4a",
     values: [
         "aconfig-values-ap4a-com.android.server.notification-all",
+        "aconfig-values-ap4a-com.android.window.flags-all",
     ],
 }

release/aconfig/ap4a/com.android.window.flags/Android.bp

@@ -0,0 +1,21 @@
+// Copyright 2024 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+aconfig_values {
+  name: "aconfig-values-ap4a-com.android.window.flags-all",
+  package: "com.android.window.flags",
+  srcs: [
+    "*_flag_values.textproto",
+  ]
+}

release/aconfig/ap4a/com.android.window.flags/enable_desktop_windowing_mode_flag_values.textproto

@@ -0,0 +1,6 @@
+flag_value {
+  package: "com.android.window.flags"
+  name: "enable_desktop_windowing_mode"
+  state: ENABLED
+  permission: READ_WRITE
+}