CHROMIUM: config: enable interactive governor

CHROMIUM: config: enable interactive governor

Include the interactive governor for testing.

Signed-off-by: Sam Leffler <sleffler@chromium.org>
BUG=chromium-os:17379 chromium:118032
TEST=build+boot on alex+lumpy; smoke suite (had been failing due to hung task timeout issue)

Change-Id: I0031a74ac6d829410de5e1768f3c92f19677fa8f
Reviewed-on: https://gerrit.chromium.org/gerrit/25845
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Sonny Rao <sonnyrao@chromium.org>
Commit-Ready: Sam Leffler <sleffler@chromium.org>
Tested-by: Sam Leffler <sleffler@chromium.org>