Add getAvailableNetworks.

To allow a operator test to pass we need to manually select
a network. Therefore getAvailableNetworks needs to be implemented
on CDMALTEPhone so that RIL_REQUEST_QUERY_AVAILABLE_NETWORKS is
sent to the RIL/radio.

Bug: 5420630
Change-Id: I8e138b211d42755399a9e30f3e45dde2f579401e

telephony/java/com/android/internal/telephony/cdma/CDMALTEPhone.java

@@ -245,6 +245,11 @@ public class CDMALTEPhone extends CDMAPhone {
         return mIccRecords.getMsisdnNumber();
     }
 
+    @Override
+    public void getAvailableNetworks(Message response) {
+        mCM.getAvailableNetworks(response);
+    }
+
     @Override
     public void requestIsimAuthentication(String nonce, Message result) {
         mCM.requestIsimAuthentication(nonce, result);