Java API：Android版の設計を色々修正 #2037

Job	Run time
actionlint	29s
build-and-test-java-api (windows-latest)	9m 27s
build-and-test-java-api (macos-latest)	4m 51s
build-and-test-python-api (windows-latest)	12m 30s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	3m 46s
build-and-test-python-api (macos-latest)	6m 31s
build-and-test-java-api (ubuntu-latest)	3m 46s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	2m 34s
build-and-test-python-api (ubuntu-latest)	5m 26s
build-windows-cpp-example	7m 42s
c-header	1m 30s
rust-integration-test-strategy-matrix	3s
rust-lint	4m 54s
rust-unit-test	6m 28s
shellcheck	19s
validate-cargo-lock	48s
rust-integration-test (windows-2019, directml)	5m 44s
rust-integration-test (macos-11)	2m 45s
rust-integration-test (ubuntu-20.04)	2m 4s
	1h 21m 37s

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