[MEP] Platform initial support for eSim Multiple Enabled Profiles.

Port concept is introduced to support MEP feature. Refactoring UiccController, UiccCard, and
UiccProfile to add UiccPort between UiccCard and UiccProfile. Most of the UiccCard functioning is
moved to UiccPort.

Added default port index value of uicc card.

Bug: 199559346
Test: Manual
Change-Id: Iaf6af6d5573976a6f85a36570900fb03778e1909
Merged-In: Iaf6af6d5573976a6f85a36570900fb03778e1909

telephony/java/android/telephony/TelephonyManager.java

@@ -315,6 +315,12 @@ public class TelephonyManager {
      */
     public static final int UNINITIALIZED_CARD_ID = -2;
 
+    /**
+     * Default port index for the UICC Card
+     * @hide
+     */
+    public static final int DEFAULT_PORT_INDEX = 0;
+
     private final Context mContext;
     private final int mSubId;
     @UnsupportedAppUsage