cras: Support -DHAVE_FUZZER (#8088)
cras: Support -DHAVE_FUZZER (#8088)

To fix https://crbug.com/oss-fuzz/49371,
passing HAVE_FUZZER flag during library build stage.

And by pass DBus usage in https://crrev.com/c/3787999.

BUG=oss-fuzz:49371

Co-authored-by: paulhsia <e09ac2debfefa3666e69a4e41e179a1517e8fddf@google.com>
skia-dev/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,google/oss-fuzz,google/oss-fuzz,google/oss-fuzz,google/oss-fuzz,google/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,google/oss-fuzz,skia-dev/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,skia-dev/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,skia-dev/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,skia-dev/oss-fuzz,skia-dev/oss-fuzz