* Add new `recv` method that takes a `Vec<u8>` and automatically
allocates extra buffer space and retries the read call if the buffer
does not have enough capacity.
* Rename the existing `recv` method to `recv_no_alloc`, and update docs
to clarify the behaviors of both methods.
* Add tests for the new `recv` method and update existing tests to use
`recv_no_alloc` instead.
Test: tipc-test-rs -m 1024 -t echo
Bug: 226659377
Change-Id: Ic437b617751e865da119fe0c4ef8aa456a63bf3c
Test logic is based on the tests in the original tipc-test C binary,
but adapted to use the Rust unit test infrastructure to make running
tests easier.
Test: Ran the tests
Bug: 226659377
Change-Id: I998013b2f8b304299acb09d58beb49330747802a
