MBED_DEPRECATE macros is added to string-based APIs.
New, non-string-based APIs are added in their place.
Wiced binaries rebuilt
Any existing stubs or mocks are adjusted to compile and run with the newly added non-string based functions.
Describe the return values with as much detail as possible, to let user only check the relevant return codes, instead of all nsapi_error_t. Refer to underlying APIs wherever possible.