[UPSTREAM] chore: change how preprocessor_utils iterates tokens (#5214)

Bug: 244486343
Test: presubmit
Change-Id: I0a8f18a5f2da0ea722d1d53110d3db59a7cdbd38
(cherry picked from commit 15992735b55764e2e502e8ac81f03b32f7653c04)
1 file changed