[Chameleon Video] Create pool to run image comparison tests.

Currently, the video image comparison tests run on the pool
chameleon_hdmi_stable. This pool is reserved for devices that
produce stable results for display_* tests. Video image comparison
tests tend to stabilize quicker for new boards, therefore such
new boards can begin to run these image comparison tests sooner.

Create pool: chameleon_video_capture_stable for that purpose.

TEST=suite_scheduler sanity.

Change-Id: I5da6bbeec6a1ffbdd4f5e6f417bc8e396670b0da
Reviewed-on: https://chromium-review.googlesource.com/327317
Commit-Ready: Mussa Kiroga <mussa@chromium.org>
Tested-by: Mussa Kiroga <mussa@chromium.org>
Reviewed-by: Kalin Stoyanov <kalin@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>
Reviewed-on: https://chromium-review.googlesource.com/327865
Reviewed-by: Mussa Kiroga <mussa@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index ed6b2fa..dc2e53d 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -817,5 +817,5 @@
 run_on: new_build
 suite: video_image_comparison_chameleon
 branch_specs: >=tot-2
-pool: chameleon
-job_retry: True
\ No newline at end of file
+pool: chameleon_video_capture_stable
+job_retry: True