Remove more JS export/jsname annotations and string to long conversion

Without transpiling the code to typescript, it is no longer necessary to keep the values as string, we can use the native Kotlin Long type instead

Bug: 311642700
Test: atest FlickerLibTest FlickerLibUtilTests FlickerLibE2eTest
Change-Id: I4d300738d7e0eca3da5e338e9f842448fedba1e9
11 files changed