[lib] implement reply count for composable DM messages

Summary:
[ENG-9273](https://linear.app/comm/issue/ENG-9273/update-the-reply-count-for-thick-sidebars).

Depends on D13426

Test Plan:
1. Reply count on sender.
2. Reply count on receiver.
3. Reply count when retrying.
Tested both web and native.

Reviewers: tomek, marcin

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13427

lib/shared/dm-ops/process-dm-ops.js

@@ -344,16 +344,34 @@ function useSendComposableDMOperation(): (
         utilities,
       );
 
-      const notificationsCreationData = await dmOpSpecs[
-        op.type
-      ].notificationsCreationData?.(op, utilities);
+      const spec = dmOpSpecs[op.type];
+
+      const notificationsCreationDataPromise: Promise<?NotificationsCreationData> =
+        (async () => {
+          if (!spec?.notificationsCreationData) {
+            return null;
+          }
+          return await spec.notificationsCreationData(op, utilities);
+        })();
+
+      const [{ rawMessageInfos, updateInfos }, notificationsCreationData] =
+        await Promise.all([
+          dmOpSpecs[op.type].processDMOperation(op, utilities),
+          notificationsCreationDataPromise,
+        ]);
+
+      const newUpdateInfos = getThreadUpdatesForNewMessages(
+        rawMessageInfos,
+        updateInfos,
+        utilities,
+      );
 
       dispatchWithMetadata(
         {
           type: processDMOpsActionType,
           payload: {
             rawMessageInfos: [],
-            updateInfos: [],
+            updateInfos: newUpdateInfos,
             outboundP2PMessages,
             composableMessageID,
             notificationsCreationData,