Fix crash in jank monitor debug overlay

Fix CalledFromWrongThreadException crash which occurred when
InteractionJankMonitor is used for multiple Views that run on different
threads.

Also, create a new trace track so usage of the debug overlay is more
apparent when viewing a trace. Traces that use the debug overlay should
not be used for performance analysis.

Test: Enable debug overlay, open QS, then tap gear icon to open
      Settings. Make sure system does not crash
Bug: 279472146
Change-Id: I68ba670dfd6c4c055c10ede357b10a37a9e83cb7