Fix typo in class2greylist

The name of framework's app usage annotation had a typo in it.

Test: N/A, annotation not used anywhere yet
Change-Id: I33f2236f693ed316eddd5065064c3e4b1b67c4eb
diff --git a/tools/class2greylist/src/com/android/class2greylist/Class2Greylist.java b/tools/class2greylist/src/com/android/class2greylist/Class2Greylist.java
index 008bf70..3e9e320 100644
--- a/tools/class2greylist/src/com/android/class2greylist/Class2Greylist.java
+++ b/tools/class2greylist/src/com/android/class2greylist/Class2Greylist.java
@@ -33,7 +33,7 @@
  */
 public class Class2Greylist {
 
-    private static final String ANNOTATION_TYPE = "Landroid/annotation/UnsupportedAppUsage ;";
+    private static final String ANNOTATION_TYPE = "Landroid/annotation/UnsupportedAppUsage;";
 
     public static void main(String[] args) {
         Options options = new Options();