remove system_ext aconfig_flags.pb look up

system_ext and system are treated as the same container now, we no
longer producing system_ext aconfig_flags.pb, resulting unwanted log
spam in logcat. Thus removing it here.

Test: m
Change-Id: Ia34700c37df0f00bbaa85030742e4b7b70595121
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/DeviceConfigService.java b/packages/SettingsProvider/src/com/android/providers/settings/DeviceConfigService.java
index 2227943..9140cef 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/DeviceConfigService.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/DeviceConfigService.java
@@ -66,7 +66,6 @@
 public final class DeviceConfigService extends Binder {
     private static final List<String> sAconfigTextProtoFilesOnDevice = List.of(
             "/system/etc/aconfig_flags.pb",
-            "/system_ext/etc/aconfig_flags.pb",
             "/product/etc/aconfig_flags.pb",
             "/vendor/etc/aconfig_flags.pb");
 
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
index 68b66df..3b4988e 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
@@ -171,7 +171,6 @@
 
     private static final List<String> sAconfigTextProtoFilesOnDevice = List.of(
             "/system/etc/aconfig_flags.pb",
-            "/system_ext/etc/aconfig_flags.pb",
             "/product/etc/aconfig_flags.pb",
             "/vendor/etc/aconfig_flags.pb");