heap: Add Oilpan folks to COMMON_OWNERS

This adds ownership of tests.

Bug: chromium:1056170
Change-Id: Ibed6ee0024d34c886817d273660922d5cc6865ec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2141734Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67106}

COMMON_OWNERS

@@ -2,6 +2,7 @@ adamk@chromium.org
 ahaas@chromium.org
 bbudge@chromium.org
 binji@chromium.org
+bikineev@chromium.org
 bmeurer@chromium.org
 cbruni@chromium.org
 clemensb@chromium.org
@@ -25,6 +26,7 @@ mslekova@chromium.org
 mvstanton@chromium.org
 mythria@chromium.org
 neis@chromium.org
+omerkatz@chromium.org
 petermarshall@chromium.org
 rmcilroy@chromium.org
 sigurds@chromium.org