fix: correct null markers for array and literal fields in JavaWireFormat

- writeIntArray/writeStringArray etc. use -1 for null (not 0)
- Numeric literal field names (e.g., "-1" from writeInt(-1)) emit
  the literal value directly instead of struct field access
- Default null marker changed to -1 (length-based protocols),
  only typed_object uses 0 (flag-based)

Fixes WorkSource chains field writing 0 instead of -1, which caused
Java's readParcelableList to consume extra bytes and corrupt
subsequent fields (root cause of RegisterLocationListener NPE).

Verified on phone: full binder roundtrip with ILocationListener
callback delivers correct location data (37.7749, -122.4194).

Author: xaionaro@dx.center