Add fuzzer for json-reader

Haiku can now fuzz java code in Android that can run on host.
go/haiku-java-fuzzing
Fuzzer stats from local runs (go/paste/6331438778548224):
exec per second: 4
coverage: 85/512

Test: m json-reader-fuzzer

Change-Id: Id3ca8f85bc6b886af0fba5ff6111d82abddc9a88
2 files changed