Add xutan@ to WM shell owner

Also move the resource owners to the new OWNERS file from the OWNERS
file one level of folder above.

Bug: None
Test: None
Ignore-AOSP-First: Cherry picked from aosp/2162828
Change-Id: I81b3eeff0cf565482772023243652a949cfbcd1f
Merged-In: I81b3eeff0cf565482772023243652a949cfbcd1f
2 files changed