android-clat: switch OWNERS to core networking

(effectively a no-op, just more directly accomplishes the same thing)

Test: N/A, TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ie0b9f0ed5e9dcc8c05e749171bddea81320a9481

OWNERS

-include platform/system/netd:/OWNERS
+set noparent
+file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking