bluetooth: Use a new promise_test wrapper

This change wraps `promise_test` in a new function called
`bluetooth_test`.  This function automatically imports chromium-specific
libraries.  This will facilitate our transition to the new mojo bindings
as well as our migration to wpt/.

BUG=509038,699569

Change-Id: I64f3d11678c44cb74f313428f335459aaeb5f19e
Reviewed-on: https://chromium-review.googlesource.com/688109
Commit-Queue: Conley Owens <cco3@chromium.org>
Reviewed-by: Vincent Scheib <scheib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506102}
355 files changed