Don't send seqId in relayout if layout hasn't happened

During display rotation, until we've figured out the
actual display configuration, we skip layouting the containers.

This meant we were accidentally sending a seqId for a
relayout that didn't happen yet.

Bug: 372767189
Test: pip2 enter-pip with fixed-rotation.
Flag: EXEMPT bugfix
Change-Id: If12d7bc14444c62d4b6eab1a6c84180424221cc8