feat: Support zstd encoding for downloads

[congminh1254]

Support use zstd encoding while downloading files.

[coveralls]

Pull Request Test Coverage Report for Build #4429

Details

• 34 of 44 (77.27%) changed or added relevant lines in 3 files are covered.
• 3 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.02%) to 71.954%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/main/java/com/box/sdk/BoxGlobalSettings.java	2	4	50.0%
src/main/java/com/box/sdk/BoxAPIConnection.java	3	7	42.86%
src/main/java/com/box/sdk/ZstdInterceptor.java	29	33	87.88%

Files with Coverage Reduction	New Missed Lines	%
src/main/java/com/box/sdk/BoxFileUploadSession.java	1	64.67%
src/main/java/com/box/sdk/EventStream.java	1	86.46%
src/main/java/com/box/sdk/MetadataQuery.java	1	92.59%

Totals
Change from base Build #4411:	0.02%
Covered Lines:	8192
Relevant Lines:	11385

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💛 - Coveralls

[lukaszsocha2]

LGTM

[congminh1254]

It's gtg 🍡