Add a new(Empty) system service for AppFunctions project

A.K.A: Maestro

Flag: android.app.appfunctions.flags.enable_app_function_manager
BUG: 357551503
Test: Setup device with new service. No crash :).

Change-Id: I27e1782181ecda5f80574b1109c18e1d40608754
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 4e34b63..59a7cbc 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -21,6 +21,7 @@
         // !!! KEEP THIS LIST ALPHABETICAL !!!
         "aconfig_mediacodec_flags_java_lib",
         "android.adaptiveauth.flags-aconfig-java",
+        "android.app.appfunctions.flags-aconfig-java",
         "android.app.contextualsearch.flags-aconfig-java",
         "android.app.flags-aconfig-java",
         "android.app.ondeviceintelligence-aconfig-java",
@@ -1383,6 +1384,21 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+// AppFunctions
+aconfig_declarations {
+    name: "android.app.appfunctions.flags-aconfig",
+    exportable: true,
+    package: "android.app.appfunctions.flags",
+    container: "system",
+    srcs: ["core/java/android/app/appfunctions/flags/flags.aconfig"],
+}
+
+java_aconfig_library {
+    name: "android.app.appfunctions.flags-aconfig-java",
+    aconfig_declarations: "android.app.appfunctions.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
+
 // Adaptive Auth
 aconfig_declarations {
     name: "android.adaptiveauth.flags-aconfig",