Create cloud_binary_upload_service_browsertest.cc

This CL adds a browser test file for CloudBinaryUploadService.
The initial tests added check that the FCM token and access token
are populated as expected with regard to how the device is managed.

Bug: b/293581152
Change-Id: Ia9ee7cd965c2ab33e881dbaaf6fba36e6184df1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4742946


Commit-Queue: Dominique Fauteux-Chapleau <domfc@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1180459}