Add emaxx@ into OWNERS for smart card files

Bug: none
Change-Id: Iaa9be03d57fc1505dd6b85320c4ecf06b17012cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315137Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Maksim Ivanov <emaxx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791193}

chrome/browser/chromeos/login/OWNERS

@@ -7,4 +7,7 @@ alemate@chromium.org
 per-file *wizard_controller.*=set noparent
 per-file *wizard_controller.*=file://ash/login/LOGIN_LOCK_OWNERS
 
+per-file *challenge_response*=emaxx@chromium.org
+per-file *security_token*=emaxx@chromium.org
+
 # COMPONENT: UI>Shell>OOBE

chrome/browser/chromeos/login/saml/OWNERS

@@ -3,3 +3,5 @@ xiyuan@chromium.org
 
 # (in CET)
 rsorokin@chromium.org
+
+per-file *security_token*=emaxx@chromium.org

chrome/browser/resources/chromeos/login/OWNERS

@@ -7,4 +7,6 @@ tbarzic@chromium.org
 antrim@chromium.org
 rsorokin@chromium.org
 
+per-file *security_token*=emaxx@chromium.org
+
 # COMPONENT: UI>Shell>OOBE