Allow lowercase in rrule

Bug: 5822997
Change-Id: I5f309cd0f854f8ac27326e7c16f9b637b24cd604
diff --git a/src/com/android/calendarcommon/EventRecurrence.java b/src/com/android/calendarcommon/EventRecurrence.java
index ca91817..cf2b410 100644
--- a/src/com/android/calendarcommon/EventRecurrence.java
+++ b/src/com/android/calendarcommon/EventRecurrence.java
@@ -136,7 +136,7 @@
     }
 
     /** If set, allow lower-case recurrence rule strings.  Minor performance impact. */
-    private static final boolean ALLOW_LOWER_CASE = false;
+    private static final boolean ALLOW_LOWER_CASE = true;
 
     /** If set, validate the value of UNTIL parts.  Minor performance impact. */
     private static final boolean VALIDATE_UNTIL = false;