GitLab

Previously only checked if the host phone is a PhoneHub host but
did not verify whether if it was a BetterTogether host and has a
valid Bluetooth address. This CL adds those checks.

Bug: 1106937
Fixed: 1147290
Test: chromeos_components_unittest
Change-Id: I8c2e7a596655a3a9904268873c8514f1332ae234
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2538694
Commit-Queue: Jimmy Gong <jimmyxgong@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827927}