Provide samples for call management
There doesn't appear to be any examples or documentation that show how to manage calls. For example, with hfp initiating a call to a specified phone number, answering an incoming call, and hanging up a call.
Related to this, there appear to be several different configurations (compile flag) related to using ofono or not. There doesn't seem to be any way to tell how the version that was distributed was compiled (turning on DEBUG flags didn't seem to provide any information).