For validation off case, do NOT switch data until new conn is up.

For validation off data switch, we will delay to tear down the old
connection until either 1) the new connection is brought up 2) new
connection failed to bring up in 2 seconds.

This is to shorten the disconnect gap during the switch.

Bug: 140070796
Test: unittest
Change-Id: I555f4d8d900fdd081738f3db8b02fb2728a3d88c
Merged-In: I555f4d8d900fdd081738f3db8b02fb2728a3d88c
4 files changed