heif: adding libheif to be used by skia heif codec

- define platform-independent HeifDecoder interface to be used by
  skia to decode heif

- add android implementation of HeifDecoder utilizing media framework
  MediaMetadataRetriever.

bug: 64077740
Change-Id: I87d803a16c117ab081adbd7c88c1bdb3c4318d66