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Adding metrics that will be used to recorded information about the
borealis startup sequence. These will help to measure performance,
usage and where errors are occurring.

Bug: b/171339461
Change-Id: Id5fae11f5bcf57d4fb659c7c6e7b9eba2cfe985c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2509072
Commit-Queue: Daniel Ng <danielng@google.com>
Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Nic Hollingum <hollingum@google.com>
Cr-Commit-Position: refs/heads/master@{#825617}