fix error in javadoc

The "@link LargeTest" is broken since it doesn't know where that class is.

Change-Id: Ie15e40bac8a1965427e351926b2208775e79cb13
diff --git a/test-runner/src/android/test/InstrumentationTestRunner.java b/test-runner/src/android/test/InstrumentationTestRunner.java
index e586010..ee6b89c 100644
--- a/test-runner/src/android/test/InstrumentationTestRunner.java
+++ b/test-runner/src/android/test/InstrumentationTestRunner.java
@@ -33,6 +33,7 @@
 import android.test.suitebuilder.TestPredicates;
 import android.test.suitebuilder.TestSuiteBuilder;
 import android.test.suitebuilder.annotation.HasAnnotation;
+import android.test.suitebuilder.annotation.LargeTest;
 import android.util.Log;
 
 import java.io.ByteArrayOutputStream;