Don't increment seq-id for non-sync frame change

There's 2 reasons why the frame might change:
1. WM is changing it, in which case it will be in a sync
   when sync is required.
2. Client requests relayout for position+size change, in
   which case, it will trigger a BLAST sync.

In both cases, the presence of sync will already increment
the seqId, so incrementing on frame-size alone is redundant
and actually triggers false-positives.

This also means we need to tell the client not to draw
when a sync started in response to a relayout. Once the
sync actually starts, WM will send the latest layout
info via reportResized.

Bug: 435801229
Bug: 385976595
Test: Existing Tests
Flag: com.android.window.flags.always_seq_id_layout
Change-Id: Ied495ce48eb983873b6d126aafa2c9bb937f2b61