Move JavaInputStreamAdaptor into third_party and add a LICENSE file.

Change-Id: I723b15fbcf3343559fb5a3fe3015cf3db96e2841
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294696
Reviewed-by: Heather Miller <hcm@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
6 files changed