Don't relaunch activity in TaskRecord.size if caller deferResume

If the caller of TaskRecord.resize() requested resume to be deferred,
then we also don't want to ensure configuration on the top activity in
the task as that can lead to a re-launch. In this case the caller will
handle things.

Test: manual
Change-Id: I247c4409d4bd19c8ae801e1720aa415d55395201
Fixes: 37767027