Add new Android owners. am: ef1f614b35 am: dac315fc1f

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1360612

Change-Id: Icc89c7e0e0328b3e66f6350e40449e21e7424ec4
diff --git a/OWNERS b/OWNERS
index 75fd9f1..938752f 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,7 +2,9 @@
 
 # Android et. al. maintainers:
 deymo@google.com
+elsk@google.com
 senj@google.com
+xunchang@google.com
 
 # Chromium OS maintainers:
 ahassani@google.com