Code cleanup including removing direct references to IMS classes.

Also removing code in PstnIncomingCallNotifier to unregister and
re-register on phone type switch as that is not required now.

Bug: 25793157
Change-Id: Ic0c0fd5067d65b950a2a0ddb2bec528c22b694d4
diff --git a/src/com/android/phone/PhoneUtils.java b/src/com/android/phone/PhoneUtils.java
index 474b9d0..983967c 100644
--- a/src/com/android/phone/PhoneUtils.java
+++ b/src/com/android/phone/PhoneUtils.java
@@ -1897,7 +1897,7 @@
      *
      * @return true if we find a connection that is disconnected, and
      * pending removal via
-     * {@link com.android.internal.telephony.gsm.GsmCall#clearDisconnected()}.
+     * {@link com.android.internal.telephony.Call#clearDisconnected()}.
      */
     private static final boolean hasDisconnectedConnections(Call call) {
         // look through all connections for non-active ones.