Use system_ext as the container of the aconfig flags in Settings

Bug: 332723689
Test: Run `adb shell printflags` and verify the flags defined in aconfig
folders show up
Flags: EXEMPT aconfig file only changes

Change-Id: If0b497117c303a0bd0b366819c90bd11b41232c3
diff --git a/aconfig/Android.bp b/aconfig/Android.bp
index f7b4881..549ccc7 100644
--- a/aconfig/Android.bp
+++ b/aconfig/Android.bp
@@ -20,7 +20,7 @@
 aconfig_declarations {
     name: "factory_reset_flags",
     package: "com.android.settings.factory_reset",
-    container: "system",
+    container: "system_ext",
     srcs: ["factory_reset/*.aconfig"],
 }
 
@@ -32,7 +32,7 @@
 aconfig_declarations {
     name: "media_drm_flags",
     package: "com.android.settings.media_drm",
-    container: "system",
+    container: "system_ext",
     srcs: ["media_drm/*.aconfig"],
 }
 
@@ -44,7 +44,7 @@
 aconfig_declarations {
     name: "accessibility_flags",
     package: "com.android.settings.accessibility",
-    container: "system",
+    container: "system_ext",
     srcs: ["accessibility/*.aconfig"],
 }
 
@@ -56,7 +56,7 @@
 aconfig_declarations {
     name: "development_settings_flags",
     package: "com.android.settings.development",
-    container: "system",
+    container: "system_ext",
     srcs: [
         "development/**/*.aconfig",
     ],