Revert^2 "Create exported mode library for package android.service.notification"

This reverts commit 2f858356dd9688d83b3186a5a10fa67d6cb9e101.

Reason for revert: The original issue is fixed ag/26320339

Change-Id: I74bb8123fe90d82e3569a60fea44af13bcbd0f5f
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 14658e5..2047168 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -910,6 +910,8 @@
 aconfig_declarations {
     name: "android.service.notification.flags-aconfig",
     package: "android.service.notification",
+    exportable: true,
+    container: "system",
     srcs: ["core/java/android/service/notification/flags.aconfig"],
 }
 
@@ -919,6 +921,18 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+java_aconfig_library {
+    name: "android.service.notification.flags-aconfig-export-java",
+    aconfig_declarations: "android.service.notification.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+    mode: "exported",
+    min_sdk_version: "30",
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.extservices",
+    ],
+}
+
 // Smartspace
 aconfig_declarations {
     name: "android.app.smartspace.flags-aconfig",