Add missing setPulling() method in Connection.

Change-Id: I89c720b2fa3d3e1304766ba3779410b233a04c6a
diff --git a/telecomm/java/android/telecom/Connection.java b/telecomm/java/android/telecom/Connection.java
index 1b14d65..91380b2 100644
--- a/telecomm/java/android/telecom/Connection.java
+++ b/telecomm/java/android/telecom/Connection.java
@@ -1624,6 +1624,16 @@
     }
 
     /**
+     * Sets state to pulling (e.g. the connection is being pulled to the local device from another
+     * device).  Only applicable for {@link Connection}s with
+     * {@link Connection#PROPERTY_IS_EXTERNAL_CALL} and {@link Connection#CAPABILITY_CAN_PULL_CALL}.
+     */
+    public final void setPulling() {
+        checkImmutable();
+        setState(STATE_PULLING_CALL);
+    }
+
+    /**
      * Sets state to be on hold.
      */
     public final void setOnHold() {