Please add support for multiple app-protocol flags

[litan1106]

In the real world, we required to use both http and grpc protocol.

Currently, the task only support either http or grpc not allow to use both.

dapr run --app-id my-app --app-port 16002 --dapr-http-port 3602 --dapr-grpc-port 56002 --app-protocol grpc --app-protocol http --log-level debug