Revert "Convert Skottie build instructions to build an Android Library (AAR) instead of app (APK)"

This reverts commit dff4d584ed3d60705fc9eb11a2e580c19732e527.

Reason for revert: breaking the google3 roll

Change-Id: I0e26c77e9bad0f48bc726d3b63a97d5aa7fa51ac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/297190
Reviewed-by: Derek Sollenberger <djsollen@google.com>
13 files changed