Merge changes from topic "syncbranch" into gce-dev
* changes:
Add namespace to GetDefaultDomain
Revert "Allocate a virtio bridge in the host for wifi."
Make system-as-root a phone specific thing
Build fix for vport_trigger.
Merge commit 'a41bdd23' into syncbranch
Point region_end_offset to the padded offset. am: 36132645