Port Changes:
Re ordered the Device Owner Like detach/remove current owner and attach/add new
owner.
Made the static router to create as one single routeTable and push all static
rout into it.
Added Fixed IP validation in UI.

Removed some unwanted comment out.

Change-Id: I966230ea6259e5fdd044a37db3d847bcd79daa6b
Merge "Port Changes: Re ordered the Device Owner Like detach/remove current owner and attach/add new owner. Made the static router to create as one single routeTable and push all static rout into it. Added Fixed IP validation in UI."