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

aconfig/Android.bp

@@ -20,7 +20,7 @@ java_aconfig_library {
 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 @@ java_aconfig_library {
 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 @@ java_aconfig_library {
 aconfig_declarations {
     name: "accessibility_flags",
     package: "com.android.settings.accessibility",
-    container: "system",
+    container: "system_ext",
     srcs: ["accessibility/*.aconfig"],
 }
 
@@ -56,7 +56,7 @@ java_aconfig_library {
 aconfig_declarations {
     name: "development_settings_flags",
     package: "com.android.settings.development",
-    container: "system",
+    container: "system_ext",
     srcs: [
         "development/**/*.aconfig",
     ],

aconfig/accessibility/accessibility_flags.aconfig

@@ -1,5 +1,5 @@
 package: "com.android.settings.accessibility"
-container: "system"
+container: "system_ext"
 
 # NOTE: Keep alphabetized to help limit merge conflicts from multiple simultaneous editors.
 

aconfig/development/settings_core_flag_declarations.aconfig

@@ -1,5 +1,5 @@
 package: "com.android.settings.development"
-container: "system"
+container: "system_ext"
 
 flag {
   name: "a2dp_offload_codec_extensibility_settings"

aconfig/factory_reset/factory_reset_flag_declarations.aconfig

@@ -1,5 +1,5 @@
 package: "com.android.settings.factory_reset"
-container: "system"
+container: "system_ext"
 
 flag {
   name: "enable_factory_reset_wizard"

aconfig/media_drm/settings_mediadrm_flag_declarations.aconfig

@@ -1,9 +1,9 @@
 package: "com.android.settings.media_drm"
-container: "system"
+container: "system_ext"
 
 flag {
     name: "force_l3_enabled"
     namespace: "media_drm"
     description: "Feature flag of forcing L3"
     bug: "301669353"
-}
+}