Delete flicker datatype objects

Since winscope no longer uses flicker code, we don't need to compile all the code to JS. This means we can reuse the standard Android objects and simplify the code

Morevoer, we'll be able to not create the flicker objects before actually loading the traces, mitigating resource usage

Bug: 311642700
Test: atest FlickerLibTest FlickerLibUtilTests FlickerLibE2eTest
Change-Id: Ie5d7618eb9436cedc5151481f17afd0620b8dbb9