Uncomment mikrawczyk in OWNERS file

The mikrawczyk was commented out because of no AOSP account.

The AOSP gerrit account was now created, and I'm removing the
comment from my email.

Bug: None
Test: None
Change-Id: I7685035441ff9efa24a52b51768abc1eb7a1436e

OWNERS

@@ -3,6 +3,6 @@
 # Please update this list if you find better owner candidates.
 mwojtas@google.com
 bgrzesik@google.com
-#mikrawczyk@google.com
+mikrawczyk@google.com
 zyta@google.com
 acourbot@google.com