Break up Java PostCommit a bit (#14321)
Break up Java PostCommit a bit (#14321)

Co-authored-by: Tomo Suzuki <b6717de8c25e3ebb7c927a3119bc5aa2a9fbc0f5@gmail.com>

axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam,axbaretto/beam