Add owners file for rebootescrow

Applies to the default implementation and VTS tests. The AIDL is still
managed by API review council.

Test: No functional change
Change-Id: Icb2d9182c1b3376d6b46b467388785e7180db1e9
diff --git a/rebootescrow/aidl/default/OWNERS b/rebootescrow/aidl/default/OWNERS
new file mode 100644
index 0000000..c5288d6
--- /dev/null
+++ b/rebootescrow/aidl/default/OWNERS
@@ -0,0 +1,2 @@
+kroot@google.com
+paulcrowley@google.com