Fix unit tests

bug: 4361079
Change-Id: I4463187e4b7b6cc6b9c9e6bce5f4c1d690f52a79
diff --git a/proguard.flags b/proguard.flags
index b39a182..b51383a 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -192,7 +192,7 @@
   *** getBody();
 }
 
--keepclasseswithmembers class com.android.email.mail.FolderProperties {
+-keepclasseswithmembers class com.android.email.FolderProperties {
   *** getDisplayName(int);
 }