fix build

remove extra import

Change-Id: Ia3f764e87bc412ec65da82f7ffd5c21f508229c4

Author: guang-google

tests/DumpRenderTree/src/com/android/dumprendertree/TestShellActivity.java

@@ -16,7 +16,6 @@
 
 package com.android.dumprendertree;
 
-import com.android.browser.WebViewProperties;
 import com.android.dumprendertree.forwarder.ForwardService;
 
 import android.app.Activity;