Enforce FEATURE_TELEPHONY_SUBSCRIPTION in getPackagesWithCarrierPrivileges

Adding feature enforcemnet for exposing
TelephonyManager#getPackagesWithCarrierPrivileges as System API

Bug: 366598445
Bug: 367831385
Test: atest CtsTelephonyTestCases:TelephonyManagerTest
Flag: android.os.mainline_vcn_platform_api
Change-Id: I78717aa076404863f38fe5d852c4692f0e7517b7
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index dc4290d..4bd6be0 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -7695,6 +7695,12 @@
     @Override
     public List<String> getPackagesWithCarrierPrivileges(int phoneId) {
         enforceReadPrivilegedPermission("getPackagesWithCarrierPrivileges");
+
+        enforceTelephonyFeatureWithException(
+                getCurrentPackageName(),
+                PackageManager.FEATURE_TELEPHONY_SUBSCRIPTION,
+                "getPackagesWithCarrierPrivileges");
+
         Phone phone = PhoneFactory.getPhone(phoneId);
         if (phone == null) {
             return Collections.emptyList();