Add owner for ColorDisplayService

Test: make -j100
Change-Id: I776acca1fa91800d225aae3d1d63447d295ed6cc
diff --git a/services/core/java/com/android/server/display/OWNERS b/services/core/java/com/android/server/display/OWNERS
index 7e7335d..8361421 100644
--- a/services/core/java/com/android/server/display/OWNERS
+++ b/services/core/java/com/android/server/display/OWNERS
@@ -1 +1,3 @@
 michaelwr@google.com
+
+per-file ColorDisplayService.java=christyfranks@google.com
\ No newline at end of file