[androidkit] Introduce Image support

Two sources from now:

  - encoded data factory
  - Surface.makeImageSnapshot()

Change-Id: Icbf2f855e489839dc82db425916c8644418a2fb7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/410324
Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
12 files changed