Fix proguard options.

Change-Id: I0b97bddc8c53f02a22b5c392f91a8b2709cb0ffb
diff --git a/proguard.flags b/proguard.flags
index 957cfa3..3f2f6e1 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -1,5 +1,5 @@
 -keep class com.android.providers.contacts.ContactsDatabaseHelper {
-  * <init>(...);
+  <init>(...);
 }
 
 # Any methods whose name is '*ForTest' are preserved.