Create a stub for SupervisionService.

Test: adb shell dumpsys supervision
Change-Id: I63ee5b4fa46fac4ac285ea053fb168c24a43063c
Flag: android.app.supervision.flags.supervision_api
Bug: 336297680
Bug: 356895431
Bug: 356895439
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 59a7cbc..88b6737 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -26,6 +26,7 @@
         "android.app.flags-aconfig-java",
         "android.app.ondeviceintelligence-aconfig-java",
         "android.app.smartspace.flags-aconfig-java",
+        "android.app.supervision.flags-aconfig-java",
         "android.app.usage.flags-aconfig-java",
         "android.app.wearable.flags-aconfig-java",
         "android.appwidget.flags-aconfig-java",
@@ -1212,6 +1213,21 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+// Supervision
+aconfig_declarations {
+    name: "android.app.supervision.flags-aconfig",
+    exportable: true,
+    package: "android.app.supervision.flags",
+    container: "system",
+    srcs: ["core/java/android/app/supervision/flags.aconfig"],
+}
+
+java_aconfig_library {
+    name: "android.app.supervision.flags-aconfig-java",
+    aconfig_declarations: "android.app.supervision.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
+
 // SurfaceFlinger
 java_aconfig_library {
     name: "surfaceflinger_flags_java_lib",