adb: win32: Improve Winsock error code mappings and strings

Improved mapping of Winsock error codes to POSIX error codes, especially
WSAECONNABORTED to EPIPE (which WriteFdExactly() looks for) when sending
to a closed socket and WSAECONNRESET to ECONNRESET when the peer resets
the connection.

Use a macro to map strerror() to adb_strerror() which handles these
POSIX error codes that the Windows C Runtime doesn't recognize.

Also:

* Unittest for adb_strerror().

* Don't trace when send() returns WSAEWOULDBLOCK because that is
  expected.

Change-Id: If46aeb7b36de3eebfbbccf5478ff5b1bb087714b
Signed-off-by: Spencer Low <CompareAndSwap@gmail.com>