Add java_fuzz module to build java fuzzers

This change adds a new module to soong to be able to build Java fuzz
targets be able to run using Jazzer. Jazzer is an open source fuzzing engine
supported by OSS-Fuzz.

Bug: 211671266
Test: go test -run TestJavaFuzz
Change-Id: Id7c346694f5986f6e15210c359fd533fbb7001eb