Add UMA histograms for Chrome OS Camera Service

Add histograms for the following metrics added in Chrome OS CL
crrev.com/c/1577227.
* Numerical histogram for JEA compression time, session time, OpenDevice() time, ConfigureStreams() time
* Enum histogram for errors, camera facing

Bug: b/130848934, 955940

Change-Id: I0441a472004159a5947b3e0747de60ecb1b9ad05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1583034
Commit-Queue: Wei Lee <wtlee@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660436}
2 files changed