Show 3G data icon for TD-SCDMA network type

- The data annunciator on the UI shows up as
"G" instead of "3G"
- Map the 3G telephony icon to network type
TD-SCDMA

Bug: 36802489
Test: manual
Change-Id: I63a0e54aab7fda2bcc6f098bb0b43799aad2f6c2

packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java

@@ -182,6 +182,7 @@ public class MobileSignalController extends SignalController<
         mNetworkToIconLookup.put(TelephonyManager.NETWORK_TYPE_EVDO_B, TelephonyIcons.THREE_G);
         mNetworkToIconLookup.put(TelephonyManager.NETWORK_TYPE_EHRPD, TelephonyIcons.THREE_G);
         mNetworkToIconLookup.put(TelephonyManager.NETWORK_TYPE_UMTS, TelephonyIcons.THREE_G);
+        mNetworkToIconLookup.put(TelephonyManager.NETWORK_TYPE_TD_SCDMA, TelephonyIcons.THREE_G);
 
         if (!mConfig.showAtLeast3G) {
             mNetworkToIconLookup.put(TelephonyManager.NETWORK_TYPE_UNKNOWN,

telephony/java/android/telephony/TelephonyManager.java

@@ -1647,6 +1647,10 @@ public class TelephonyManager {
         return getTelephonyProperty(phoneId, TelephonyProperties.PROPERTY_OPERATOR_ISO_COUNTRY, "");
     }
 
+    /*
+     * When adding a network type to the list below, make sure to add the correct icon to
+     * MobileSignalController.mapIconSets().
+     */
     /** Network type is unknown */
     public static final int NETWORK_TYPE_UNKNOWN = 0;
     /** Current network is GPRS */