b/3102609 Update widgets when device tz changes. Do not merge

Change-Id: I4e1a03dadcddc80bcc77c1d689e8eac267d47d7e
diff --git a/src/com/android/providers/calendar/CalendarProvider2.java b/src/com/android/providers/calendar/CalendarProvider2.java
index 8dcdf69..1fc1adf 100644
--- a/src/com/android/providers/calendar/CalendarProvider2.java
+++ b/src/com/android/providers/calendar/CalendarProvider2.java
@@ -438,6 +438,7 @@
             Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
             try {
                 doUpdateTimezoneDependentFields();
+                triggerAppWidgetUpdate(-1 /*changedEventId*/ );
             } catch (SQLException e) {
                 if (Log.isLoggable(TAG, Log.ERROR)) {
                     Log.e(TAG, "doUpdateTimezoneDependentFields() failed", e);