Java: Add `SSCAN` command #1010

Job	Run time
test-ubuntu-latest (6.2.14)	7m 57s
test-ubuntu-latest (7.2.3)	8m 4s
build-macos-latest	4m 24s
lint-rust	1m 41s
build-amazonlinux-latest	2m 59s
Build and test Node wrapper on Linux musl	4m 4s
	29m 9s

Provide feedback