GitLab

Adding features for ram_vs_swap_weight and extra_free kernel
tunables.

BUG=chromium:1019806
TESTED=Validated on an octopus device

Change-Id: I681e09ba7cae3deeab69a8833fa068ed09f9eaf7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1890792Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Brian Geffon <bgeffon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710961}