Add dump() to ImsStateCallbackController

It is updated to dump the state of ImsStateCallbackController
when dumpsys for the service, phone, is called.

Bug: 178016400
Test: manual
Change-Id: I04abab941b55b81305a9e3fd327874dab3779323
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index 9607919..e7cb28c 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -1038,6 +1038,12 @@
         } catch (Exception e) {
             e.printStackTrace();
         }
+        pw.println("ImsStateCallbackController:");
+        try {
+            if (mImsStateCallbackController != null) mImsStateCallbackController.dump(pw);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
         pw.decreaseIndent();
         pw.println("------- End PhoneGlobals -------");
     }