Fix permissions xml and provider access

ThemePicker need to add its use of permissions and declare the
priv app permission parts in an xml file to be able to start.

ThemePicker also need to declare which other apps it intends to
interact with in queries. This enables the Launcher grid/icon preview.

Test: Manual
Bug: 274634330
Change-Id: I55fb94279abeab15dd16a6cabc0bf086c621fc42
diff --git a/android.software.theme_picker.xml b/android.software.theme_picker.xml
new file mode 100644
index 0000000..95d49f4
--- /dev/null
+++ b/android.software.theme_picker.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2023 The Android Open Source Project
+
+     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.
+-->
+<permissions>
+    <privapp-permissions package="com.android.wallpaper">
+        <permission name="android.permission.BIND_WALLPAPER"/>
+        <permission name="android.permission.CHANGE_OVERLAY_PACKAGES"/>
+        <permission name="android.permission.CUSTOMIZE_SYSTEM_UI"/>
+        <permission name="android.permission.MODIFY_DAY_NIGHT_MODE"/>
+        <permission name="android.permission.READ_DEVICE_CONFIG"/>
+        <permission name="android.permission.READ_WALLPAPER_INTERNAL"/>
+        <permission name="android.permission.SET_WALLPAPER"/>
+        <permission name="android.permission.SET_WALLPAPER_COMPONENT"/>
+        <permission name="android.permission.WRITE_SECURE_SETTINGS"/>
+    </privapp-permissions>
+</permissions>