GitLab

This is a reland of 027aa92e

Relanding but disabling test on CrOS devices (some of our CrOS devices
seem to have asymmetric CPUs that aren't covered by the test).

Original change's description:
> base: Add API to restrict thread affinity to little cores on Android
>
> Adds functions that facilitate setting the CPU affinity of a given
> thread or process to all little cores on the system.
>
> We intend to use this API to run a power experiment.
>
> Bug: 1111789
> Change-Id: I6c3d32c2338e9f00464e8b6a8c96af93658a3ae2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2335176
> Commit-Queue: Eric Seckler <eseckler@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#794998}

TBR: dcheng@chromium.org
Bug: 1111789
Change-Id: I59315ec0e9a1727986278a04fa5bde409143dfb5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339416Reviewed-by: Eric Seckler <eseckler@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Auto-Submit: Eric Seckler <eseckler@chromium.org>
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795126}