Update carrier privilege check in enforceSubscriptionPlanAccess

Remove isEmbedded() check, since this can be called on both PSIM and
ESIM. Replace SM#canManageSubscription with TM#hasCarrierPrivileges,
since it is a superset of the checks done in SM#canManageSubscription
and applies to both PSIMs as well as ESIMS. Updated the documentation
for the two APIs to clarify the differences.

Test: atest CtsTelephonyTestCases (SubscriptionManagerTest)
Fix: 180451446
Change-Id: Icb4e2c619dacaea9e74cedea31865ec1eb689dce

services/core/java/com/android/server/net/NetworkPolicyManagerService.java

@@ -3067,23 +3067,19 @@ public class NetworkPolicyManagerService extends INetworkPolicyManager.Stub {
         // Verify they're not lying about package name
         mAppOps.checkPackage(callingUid, callingPackage);
 
-        final SubscriptionManager sm;
-        final SubscriptionInfo si;
         final PersistableBundle config;
+        final TelephonyManager tm;
         final long token = Binder.clearCallingIdentity();
         try {
-            sm = mContext.getSystemService(SubscriptionManager.class);
-            si = sm.getActiveSubscriptionInfo(subId);
             config = mCarrierConfigManager.getConfigForSubId(subId);
+            tm = mContext.getSystemService(TelephonyManager.class);
         } finally {
             Binder.restoreCallingIdentity(token);
         }
 
-        // First check: is caller the CarrierService?
-        if (si != null) {
-            if (si.isEmbedded() && sm.canManageSubscription(si, callingPackage)) {
-                return;
-            }
+        // First check: does caller have carrier privilege?
+        if (tm != null && tm.hasCarrierPrivileges(subId)) {
+            return;
         }
 
         // Second check: has the CarrierService delegated access?

telephony/java/android/telephony/SubscriptionInfo.java

@@ -148,13 +148,14 @@ public class SubscriptionInfo implements Parcelable {
 
     /**
      * The access rules for this subscription, if it is embedded and defines any.
+     * This does not include access rules for non-embedded subscriptions.
      */
     @Nullable
     private UiccAccessRule[] mNativeAccessRules;
 
     /**
      * The carrier certificates for this subscription that are saved in carrier configs.
-     * The other carrier certificates are embedded on Uicc and stored as part of mNativeAccessRules.
+     * This does not include access rules from the Uicc, whether embedded or non-embedded.
      */
     @Nullable
     private UiccAccessRule[] mCarrierConfigAccessRules;
@@ -661,7 +662,6 @@ public class SubscriptionInfo implements Parcelable {
      * is authorized to manage this subscription.
      * TODO and fix it properly in R / master: either deprecate this and have 3 APIs
      *  native + carrier + all, or have this return all by default.
-     * @throws UnsupportedOperationException if this subscription is not embedded.
      * @hide
      */
     @SystemApi

telephony/java/android/telephony/SubscriptionManager.java

@@ -2631,6 +2631,10 @@ public class SubscriptionManager {
      * Checks whether the app with the given context is authorized to manage the given subscription
      * according to its metadata.
      *
+     * Only supported for embedded subscriptions (if {@link SubscriptionInfo#isEmbedded} returns
+     * true). To check for permissions for non-embedded subscription as well,
+     * {@see android.telephony.TelephonyManager#hasCarrierPrivileges}.
+     *
      * @param info The subscription to check.
      * @return whether the app is authorized to manage this subscription per its metadata.
      */
@@ -2643,6 +2647,10 @@ public class SubscriptionManager {
      * be authorized if it is included in the {@link android.telephony.UiccAccessRule} of the
      * {@link android.telephony.SubscriptionInfo} with the access status.
      *
+     * Only supported for embedded subscriptions (if {@link SubscriptionInfo#isEmbedded} returns
+     * true). To check for permissions for non-embedded subscription as well,
+     * {@see android.telephony.TelephonyManager#hasCarrierPrivileges}.
+     *
      * @param info The subscription to check.
      * @param packageName Package name of the app to check.
      * @return whether the app is authorized to manage this subscription per its access rules.

telephony/java/android/telephony/TelephonyManager.java

@@ -8534,6 +8534,9 @@ public class TelephonyManager {
      * call will return true. This access is granted by the owner of the UICC
      * card and does not depend on the registered carrier.
      *
+     * Note that this API applies to both physical and embedded subscriptions and
+     * is a superset of the checks done in SubscriptionManager#canManageSubscription.
+     *
      * @return true if the app has carrier privileges.
      */
     public boolean hasCarrierPrivileges() {
@@ -8547,6 +8550,9 @@ public class TelephonyManager {
      * call will return true. This access is granted by the owner of the UICC
      * card and does not depend on the registered carrier.
      *
+     * Note that this API applies to both physical and embedded subscriptions and
+     * is a superset of the checks done in SubscriptionManager#canManageSubscription.
+     *
      * @param subId The subscription to use.
      * @return true if the app has carrier privileges.
      * @hide