Add reachability JS snippet for Conversations

conversations/reachability-indicator/process-user-updates/meta.json

@@ -0,0 +1,5 @@
+{
+  "title": "Handle Reachability updates on client side",
+  "description": "Handle an UpdateReason change and process the Reachability Indicators",
+  "type": "mobile"
+}

conversations/reachability-indicator/process-user-updates/process-user-updates.js

@@ -0,0 +1,18 @@
+// function called after client init to set up event handlers
+function registerEventHandlers() {
+  user = conversationsClient.user;
+  // Register User updated event handler
+  user.on('updated', function(event) {
+    handleUserUpdate(event.user, event.updateReasons)
+  });
+}
+
+// function to handle User updates
+function handleUserUpdate(user, updateReasons) {
+  // loop over each reason and check for reachability change
+  updateReasons.forEach(function(reason) {
+    if (reason == 'online') {
+      //do something
+    }
+  });
+}