Add limited bp2build converter of java_sdk_library

Only public, system, test, module_lib and system_server are
converted in order to generate api_fingerprint.txt in Bazel.

Test: java_sdk_library_conversion_test.go and TH

Bug: 266973526
Change-Id: I67a00806165e5afad3876b6cd5cdbc6b0dd65d8b