drm_hwcomposer: OWNERS: Update John Stultz' email adddress

Update my email address

Signed-off-by: John Stultz <jstultz@google.com>
Change-Id: I5378ce40c2f96cf5bca252592ebc2b722ffd2edf
diff --git a/OWNERS b/OWNERS
index dd8e743..cead4fc 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,5 +1,5 @@
 adelva@google.com
 dimitrysh@google.com
-john.stultz@linaro.org
+jstultz@google.com
 marcheu@google.com
 seanpaul@google.com