chore: Provider APIs for SMS Channel - Bandwidth (#3889)

fixes: #3888

app/services/sms/send_on_sms_service.rb

@@ -0,0 +1,16 @@
+class Sms::SendOnSmsService < Base::SendOnChannelService
+  private
+
+  def channel_class
+    Channel::Sms
+  end
+
+  def perform_reply
+    send_on_sms
+  end
+
+  def send_on_sms
+    message_id = channel.send_message(message.conversation.contact_inbox.source_id, message)
+    message.update!(source_id: message_id) if message_id.present?
+  end
+end