chore: Roundrobin should consider auto-offline false config (#5160)

Previously round-robin conversation assignment logic wasn't considering the case where the Agent who had auto-offline config set as false.

fixes: #4780

spec/lib/online_status_tracker_spec.rb

@@ -0,0 +1,24 @@
+require 'rails_helper'
+
+describe OnlineStatusTracker do
+  let!(:account) { create(:account) }
+  let!(:user1) { create(:user, account: account) }
+  let!(:user2) { create(:user, account: account) }
+  let!(:user3) { create(:user, account: account) }
+
+  context 'when get_available_users' do
+    before do
+      described_class.update_presence(account.id, 'User', user1.id)
+    end
+
+    it 'returns only the online user ids with presence' do
+      expect(described_class.get_available_users(account.id).keys).to contain_exactly(user1.id.to_s)
+      expect(described_class.get_available_users(account.id).values).not_to include(user3.id)
+    end
+
+    it 'returns agents who have auto offline configured false' do
+      user2.account_users.first.update(auto_offline: false)
+      expect(described_class.get_available_users(account.id).keys).to contain_exactly(user1.id.to_s, user2.id.to_s)
+    end
+  end
+end