DO NOT MERGE. Integrate from MR 1 to fix issue #5366535: Lockscreen...

...has wrong layout but corrects itself

Maybe fix issue #5405788: Device continuously opening and closing...

...the "Complete action using" dialog

I have never been able to reproduce this consistently, but here is
another stab in the twilight.  It looks like during boot we have
a potential race where we could reset the config sequence number after
we had gone through a config change, causing ActivityThread to ignore
a following config change.  Maybe this change will help.

Change-Id: I7199b6de370488e8d897d6a78ff6f15624da862c