AI 148879: Update SignatureTest with many fixes.
  - Update SignatureTest to build against SDK
  - Provides better error messages on failures
  - Fixes issue with final methods in final classes (http://b/1839589)
  - Fixes issue with strict checking on native modifier (http://b/1839558)
  - Fixes issue with removal of abstract modifier on a class (http://b/1839622)
  BUG=1839558,1839622,1839589

Automated import of CL 148879
9 files changed
tree: 41068299c131df8d47a3a3704bf553ccbd8ea9a9
  1. tests/
  2. tools/
  3. Android.mk