Add System API to indicate whether physical SIM can be disabled.

Bug: 133379187
Test: build
Change-Id: I764f344b0d430cb49ccccc9f402139ea32e70c92

api/system-current.txt

@@ -8657,6 +8657,7 @@ package android.telephony {
   }
 
   public class SubscriptionManager {
+    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean canDisablePhysicalSubscription();
     method public java.util.List<android.telephony.SubscriptionInfo> getAvailableSubscriptionInfoList();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public int getEnabledSubscriptionId(int);
     method @NonNull public static android.content.res.Resources getResourcesForSubId(@NonNull android.content.Context, int);

telephony/java/android/telephony/SubscriptionManager.java

@@ -3110,7 +3110,11 @@ public class SubscriptionManager {
     }
 
     /**
-     * Enables or disables a subscription. This is currently used in the settings page.
+     * Enables or disables a subscription. This is currently used in the settings page. It will
+     * fail and return false if operation is not supported or failed.
+     *
+     * To disable an active subscription on a physical (non-Euicc) SIM,
+     * {@link #canDisablePhysicalSubscription} needs to be true.
      *
      * <p>
      * Permissions android.Manifest.permission.MODIFY_PHONE_STATE is required
@@ -3141,6 +3145,38 @@ public class SubscriptionManager {
         return false;
     }
 
+    /**
+     * Whether it's supported to disable / re-enable a subscription on a physical (non-euicc) SIM.
+     *
+     * Physical SIM refers non-euicc, or aka non-programmable SIM.
+     *
+     * It provides whether a physical SIM card can be disabled without taking it out, which is done
+     * via {@link #setSubscriptionEnabled(int, boolean)} API.
+     *
+     * Requires Permission: READ_PRIVILEGED_PHONE_STATE.
+     *
+     * @return whether can disable subscriptions on physical SIMs.
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
+    public boolean canDisablePhysicalSubscription() {
+        if (VDBG) {
+            logd("canDisablePhysicalSubscription");
+        }
+        try {
+            ISub iSub = ISub.Stub.asInterface(ServiceManager.getService("isub"));
+            if (iSub != null) {
+                return iSub.canDisablePhysicalSubscription();
+            }
+        } catch (RemoteException ex) {
+            // ignore it
+        }
+
+        return false;
+    }
+
     /**
      * DO NOT USE.
      * This API is designed for features that are not finished at this point. Do not call this API.

telephony/java/com/android/internal/telephony/ISub.aidl

@@ -298,4 +298,6 @@ interface ISub {
     boolean setAlwaysAllowMmsData(int subId, boolean alwaysAllow);
 
     int getActiveDataSubscriptionId();
+
+    boolean canDisablePhysicalSubscription();
 }