Show badge icon if any participant in the conversation is work contact

Precompute is_enterprise and stored the value in conversation table.
Include is_enterprise in the ConversationList view.

Change-Id: I2e31bd61c08d25a296aaa3e99cb24631ae2e7976

src/com/android/messaging/datamodel/BugleDatabaseOperations.java

@@ -841,6 +841,11 @@ public class BugleDatabaseOperations {
         values.put(ConversationColumns.NAME,
                 getDefaultConversationName(participants));
 
+        // Fill in IS_ENTERPRISE.
+        final boolean hasAnyEnterpriseContact =
+                ConversationListItemData.hasAnyEnterpriseContact(participants);
+        values.put(ConversationColumns.IS_ENTERPRISE, hasAnyEnterpriseContact);
+
         fillParticipantData(values, participants);
 
         // Used by background thread when refreshing conversation so conversation could be deleted.