Add ConversionService support for ByteBuffers

Add ByteBufferConverter that is registered by default with the
DefaultConversionService. Allows conversion from/to a ByteBuffer and
byte[] or to any type that can be converted via a byte[].

Issue: SPR-10712
ConversionService JSR-356 Encoder/Decoder adapters

Develop support class allowing JSR-356 Encoder and Decoder interfaces
to delegate to Spring's ConversionService.

Issue: SPR-10694
Merge branch 'SPR-10694'

* SPR-10694:
  ConversionService JSR-356 Encoder/Decoder adapters
  Add ConversionService support for ByteBuffers