Add Phil Burk to media includes OWNERS

Change-Id: I6852d99dd1223833b5a0b23c050aef461050df0e
diff --git a/include/OWNERS b/include/OWNERS
index 88de595..e1d4db7 100644
--- a/include/OWNERS
+++ b/include/OWNERS
@@ -3,3 +3,4 @@
 jtinker@google.com
 lajos@google.com
 essick@google.com
+philburk@google.com