chore: Handle attachments in Whatsapp Channel (#3299)

send and receive attachments in 360Dialog WhatsApp channels

spec/builders/messages/facebook/message_builder_spec.rb

@@ -3,6 +3,10 @@ require 'rails_helper'
 describe  ::Messages::Facebook::MessageBuilder do
   subject(:message_builder) { described_class.new(incoming_fb_text_message, facebook_channel.inbox).perform }
 
+  before do
+    stub_request(:post, /graph.facebook.com/)
+  end
+
   let!(:facebook_channel) { create(:channel_facebook_page) }
   let!(:message_object) { build(:incoming_fb_text_message).to_json }
   let!(:incoming_fb_text_message) { Integrations::Facebook::MessageParser.new(message_object) }
@@ -16,7 +20,7 @@ describe  ::Messages::Facebook::MessageBuilder do
           first_name: 'Jane',
           last_name: 'Dae',
           account_id: facebook_channel.inbox.account_id,
-          profile_pic: 'https://via.placeholder.com/250x250.png'
+          profile_pic: 'https://chatwoot-assets.local/sample.png'
         }.with_indifferent_access
       )
       message_builder