Add Ownership to powerhint files

Bug: 248115959
Signed-off-by: Taeju Park <[email protected]>
Change-Id: I3a921c6d09bbf116df0674da1f83efa8a9d90a22

OWNERS

@@ -0,0 +1 @@
+per-file powerhint.json = [email protected],[email protected],[email protected],[email protected]