Add isAospDomainSelectionService to TelephonyManager

EmergencyCallDomainSelectionTestOnMockModem is a test
for AOSP domain selection service.

It determines whether the AOSP domain selection
service is running or not with this API.

Bug: 333893700
Test: atest EmergencyCallDomainSelectionTestOnMockModem
Change-Id: Ia5ee0074b3ebd95fe883ceb7eb4c3ab5eef4b008

telephony/java/android/telephony/TelephonyManager.java

@@ -19263,6 +19263,26 @@ public class TelephonyManager {
         return false;
     }
+    /**
+     * Returns whether the AOSP domain selection service is supported.
+     *
+     * @return {@code true} if the AOSP domain selection service is supported.
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
+    @RequiresFeature(PackageManager.FEATURE_TELEPHONY_CALLING)
+    public boolean isAospDomainSelectionService() {
+        try {
+            ITelephony telephony = getITelephony();
+            if (telephony != null) {
+                return telephony.isAospDomainSelectionService();
+            }
+        } catch (RemoteException ex) {
+            Rlog.w(TAG, "RemoteException", ex);
+        }
+        return false;
+    }
+
     /**
      * Returns the primary IMEI (International Mobile Equipment Identity) of the device as
      * mentioned in GSMA TS.37. {@link #getImei(int)} returns the IMEI that belongs to the selected

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

@@ -3243,6 +3243,12 @@ interface ITelephony {
      */
     boolean clearDomainSelectionServiceOverride();
 
+    /**
+     * @return {@code true} if the AOSP domain selection service is supported,
+     *         {@code false} otherwise.
+     */
+    boolean isAospDomainSelectionService();
+
     /**
      * Enable or disable notifications sent for cellular identifier disclosure events.
      *