Support java AST String literal with desired encoding

[winningsix]

This fixes #14397 to allow different encoding for string literal.

Description

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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[jlowe]

/ok to test

[revans2]

/merge

[winningsix]

It seems failed test cases are not related. We only changed Java binding part. Rebase to have a further try.

FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-3h-kwargs6-count] - RuntimeError: CUDA error encountered at: /opt/conda/conda-bld/work/cpp/include/cudf/detail/copy_range.cuh:182: 101 cudaErrorInvalidDevice invalid device ordinal
FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-window3-kwargs0-sum] - RuntimeError: CUDA error encountered at: /opt/conda/conda-bld/work/cpp/include/cudf/detail/copy_range.cuh:182: 101 cudaErrorInvalidDevice invalid device ordinal
FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-window3-kwargs1-mean] - RuntimeError: CUDA error encountered at: /opt/conda/conda-bld/work/cpp/include/cudf/detail/copy_range.cuh:182: 101 cudaErrorInvalidDevice invalid device ordinal
FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-window3-kwargs2-min] - RuntimeError: CUDA error encountered at: /opt/conda/conda-bld/work/cpp/include/cudf/detail/copy_range.cuh:182: 101 cudaErrorInvalidDevice invalid device ordinal
FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-window3-kwargs4-max] - RuntimeError: CUDA error encountered at: /opt/conda/conda-bld/work/cpp/include/cudf/detail/copy_range.cuh:182: 101 cudaErrorInvalidDevice invalid device ordinal
FAILED tests/test_dataframes.py::test_rolling_count_aggregations[dask-<lambda>-<lambda>0-5-window3-kwargs6-co

[ttnghia]

/ok to test