sheenachhabra c6cb6c4922 Move FileUtil.java into test_utils module
FileUtil.java can be extended to add more methods for validating
output file. This will be used in Transformer's robolectric tests and
instrumentation tests hence need to move to a common module.

PiperOrigin-RevId: 602789503
2024-01-30 11:33:10 -08:00
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