Add Ownership to powerhint files

Bug: 248115959
Signed-off-by: Taeju Park <taeju@google.com>
Change-Id: I9ba486e3be19b90e44583f2a3b8ec9d7050c7ceb
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..5aee848
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+per-file powerhint-*.json = jychen@google.com,jenhaochen@google.com,wvw@google.com,joaodias@google.com