Unify common into parser and flicker (Pt. 2)

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

This CL updates the import path removing the distinction between common
and device subpackages

Bug: 311642700
Test: atest FlickerLibTest FlickerLibUtilTests FlickerLibE2eTest
Change-Id: I06bb190ed0e60336390d5c7ea72c7585ac0ef90f