chore: Update rusty_ffmpeg to 0.16.5 and use new AV_CHANNEL_LAYOUT constants #592

Job	Run time
rustfmt_check (ubuntu-latest)	13s
rust_clippy_check_ubuntu	7m 19s
rustfmt_check (macos-latest)	15s
rustfmt_check (windows-latest)	41s
rust_clippy_check_windows	1m 29s
build_dynamic_and_test_windows_pre	8m 16s
docs_rs_check	2m 17s
build_static_and_test_ubuntu (release/6.1, nightly, no valgrind)	7m 34s
build_static_and_test_ubuntu (release/6.0, nightly, no valgrind)	6m 20s
build_static_and_test_ubuntu (release/6.1, 1.81.0, no valgrind)	6m 32s
build_static_and_test_ubuntu (release/7.0, 1.81.0, no valgrind)	7m 50s
build_static_and_test_ubuntu (release/7.0, 1.81.0, valgrind)	6m 59s
build_static_and_test_ubuntu (release/6.0, 1.81.0, no valgrind)	7m 13s
build_static_and_test_ubuntu (release/7.1, 1.81.0, no valgrind)	6m 50s
build_static_and_test_ubuntu (release/7.1, nightly, no valgrind)	8m 46s
build_static_and_test_ubuntu (release/7.1, 1.81.0, valgrind)	6m 49s
build_static_and_test_ubuntu (release/7.0, nightly, no valgrind)	7m 16s
build_dynamic_and_test_windows (1.81.0)	1m 41s
build_dynamic_and_test_windows (nightly)	1m 36s
	1h 35m 56s

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