Changes to the use statements done automatically via script
Addition of missing use statement done manually
Change-Id: I3b0d2a2a25d4c4c9d11906961634eac1d47afa80
This normalises the uses of "tokens" and "scratch"
Not changing all interal usages of "scratch"; comments
and some variables updated. Functions not updated.
Bug: T354031
Change-Id: Icf8626799615f8b95f380db9745e1447519b150a