ARROW-9393: [Doc] update supported types documentation for Java
ARROW-9393: [Doc] update supported types documentation for Java

Add LargeList and Union support

Closes #7697 from rymurr/ARROW-9393

Authored-by: Ryan Murray <fb92e361fc34219782939195a74e285e8c0fa6bf@dremio.com>
Signed-off-by: Wes McKinney <039810fad096c61acdfe8791ea9d6e2d5461285b@apache.org>

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