Make transition trace clearer

Centralized transition related traces to the same row.
Also add sync id to trace name.

Bug: 211846272
Flag: EXEMPT bugfix
Test: Trigger back gesture or launch/return to home quickly.
      The transition states show in the same row "Transition".
Change-Id: I40b5cb70b4f241e077c6b9ac7cf985ee1b691e04