Add JavaInputStreamAdaptor files into third_party directory.

This code needs to be migrated out of the main Skia directory due to its
use of the Apache 2.0 license. A followup CL will remove these files
from their current home at platform_tools/android/apps/skottie/src/
main/cpp.

Change-Id: I939b05afcebb29e1deab1d4ae1b38012f719cf7e
Bug: skia:10310
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295082
Reviewed-by: Ben Wagner <bungeman@google.com>
Reviewed-by: Weston Tracey <westont@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
3 files changed