Eliminate unnecessary observer and JOIN.

app/src/main/java/org/thoughtcrime/securesms/calls/log/CallLogRepository.kt

@@ -66,7 +66,6 @@ class CallLogRepository(
         refresh()
       }
 
-      AppDependencies.databaseObserver.registerConversationListObserver(databaseObserver)
       AppDependencies.databaseObserver.registerCallUpdateObserver(databaseObserver)
 
       emitter.setCancellable {

app/src/main/java/org/thoughtcrime/securesms/database/CallTable.kt

@@ -1274,6 +1274,12 @@ class CallTable(context: Context, databaseHelper: SignalDatabase) : DatabaseTabl
       "p.$ID, p.$TIMESTAMP, $EVENT, $DIRECTION, $PEER, p.$TYPE, $CALL_ID, $MESSAGE_ID, $RINGER, $LOCAL_JOINED, $GROUP_CALL_ACTIVE, children, in_period, ${MessageTable.BODY},"
     }
 
+    val join = if (isCount) {
+      ""
+    } else {
+      "LEFT JOIN ${MessageTable.TABLE_NAME} ON ${MessageTable.TABLE_NAME}.${MessageTable.ID} = $MESSAGE_ID"
+    }
+
     // Group call events by those we consider missed or not missed to build out our call log aggregation.
     val eventTypeSubQuery = """
       ($TABLE_NAME.$EVENT = c.$EVENT AND (
@@ -1372,7 +1378,7 @@ class CallTable(context: Context, databaseHelper: SignalDatabase) : DatabaseTabl
           cte
       ) p
       INNER JOIN ${RecipientTable.TABLE_NAME} ON ${RecipientTable.TABLE_NAME}.${RecipientTable.ID} = $PEER
-      LEFT JOIN ${MessageTable.TABLE_NAME} ON ${MessageTable.TABLE_NAME}.${MessageTable.ID} = $MESSAGE_ID
+      $join
       LEFT JOIN ${GroupTable.TABLE_NAME} ON ${GroupTable.TABLE_NAME}.${GroupTable.RECIPIENT_ID} = ${RecipientTable.TABLE_NAME}.${RecipientTable.ID}
       WHERE true_parent = p.$ID 
         AND CASE