[MEP] Add port index in SubscriptionInfo database

Bug: 199559346
Test: build, manual
Change-Id: Ia74d5e8714fc961f2d22c104683d3e8722deaa3d

core/java/android/provider/Telephony.java

@@ -5316,6 +5316,13 @@ public final class Telephony {
          */
         public static final String COLUMN_PROFILE_CLASS = "profile_class";
 
+        /**
+         * TelephonyProvider column name for the port index of the active UICC port.
+         * <P>Type: INTEGER (int)</P>
+         * @hide
+         */
+        public static final String COLUMN_PORT_INDEX = "port_index";
+
         /**
          * A testing profile can be pre-loaded or downloaded onto
          * the eUICC and provides connectivity to test equipment

telephony/java/android/telephony/SubscriptionManager.java

@@ -940,6 +940,13 @@ public class SubscriptionManager {
      */
     public static final String PROFILE_CLASS = SimInfo.COLUMN_PROFILE_CLASS;
 
+    /**
+     * TelephonyProvider column name for the port index of the active UICC port.
+     * <P>Type: INTEGER (int)</P>
+     * @hide
+     */
+    public static final String PORT_INDEX = SimInfo.COLUMN_PORT_INDEX;
+
     /**
      * TelephonyProvider column name for VoIMS opt-in status.
      *

telephony/java/android/telephony/TelephonyManager.java

@@ -325,6 +325,9 @@ public class TelephonyManager {
      */
     public static final int DEFAULT_PORT_INDEX = 0;
 
+    /** @hide */
+    public static final int INVALID_PORT_INDEX = -1;
+
     private final Context mContext;
     private final int mSubId;
     @UnsupportedAppUsage