[Cronet] Move OWNERS file to parent tests directory

This file was added when there was only Cronet/tests/cts directory.
We now have move directories inside Cronet/tests hence the move

Test: m
Change-Id: Ib9b4af307f7085844060b4aed3b7c153a64ff962
diff --git a/Cronet/tests/cts/OWNERS b/Cronet/tests/OWNERS
similarity index 100%
rename from Cronet/tests/cts/OWNERS
rename to Cronet/tests/OWNERS