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- This class exposes an AttemptConnection() function to connect the
  local Chrome OS to a remote phone device.
- Also exposes a GetStatus() function to retrieve the current status
  of the connection.

Bug: 1106937
Test: unit_tests
Change-Id: I2851cd28ba83034af8c2bddcc17f5a50ddd0c90c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2387149
Commit-Queue: Jimmy Gong <jimmyxgong@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804098}