Reland the new module for skia lib for g3

Try to merge change 296417 again with new changes to skottie BUILD in google3
This time, the autoroller shouldn't get upset.

move setupSkiaLibraryBuild call to new lib module
Move shared skottie files we intend to distribute into a library module

Change-Id: I3a86ec611cb38e1940033b60d607fabe6a4b24e1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/297842
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Jorge Betancourt <jmbetancourt@google.com>
diff --git a/.gitignore b/.gitignore
index e909ea7..b82b666c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@
 platform_tools/android/apps/*.properties
 platform_tools/android/apps/*/build
 platform_tools/android/apps/*/src/main/libs
+platform_tools/android/apps/*/*/src/main/libs
 platform_tools/android/apps/*.hprof
 platform_tools/android/apps/*/.externalNativeBuild