Update Traceur to reflect Perfetto-only engine
Traceur no longer supports atrace as a trace backend, so behavior
differentiated on Perfetto vs. atrace can be removed. This change
removes a string mentioning that Perfetto is in beta, as well as code
that checks for Perfetto before setting UI elements (custom trace tags
and long trace options). The latter has the added benefit of removing a
large gap in Traceur's main page caused by the long trace preference
category.
Test: Check that custom trace tags still exist and that the gap above
long trace settings is gone.
Bug: 266571940
Bug: 264496694
Change-Id: I849a292df9d8065f449840c54a0e2c4025e7052b
4 files changed
