[Cast,Android] Fix the RuntimeException crasher

Seems like throwing a RuntimeException is quite an overkill.
In particular, we still seem to get onResult() callback even if the GMS core connection is suspended.
Replaced the exception with a warning message in a cherrypickable way (the crash happens in M48).

BUG=579718

Review URL: https://codereview.chromium.org/1614833003

Cr-Commit-Position: refs/heads/master@{#370687}

chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/CreateRouteRequest.java

@@ -169,7 +169,10 @@ public class CreateRouteRequest implements GoogleApiClient.ConnectionCallbacks,
 
     @Override
     public void onResult(Cast.ApplicationConnectionResult result) {
-        if (mState != STATE_LAUNCHING_APPLICATION) throwInvalidState();
+        if (mState != STATE_LAUNCHING_APPLICATION
+                && mState != STATE_API_CONNECTION_SUSPENDED) {
+            throwInvalidState();
+        }
 
         Status status = result.getStatus();
         if (!status.isSuccess()) {