Add experimental contract and associated build script

Bug: 64691432
Test: builds
Change-Id: I91916f3e3a5fea4744d1b25b4011a8c2f81bdd49
6 files changed
tree: 73693628941d5444f1e4ac99cab35a0b99b9ce12
  1. contract/
  2. src/
  3. Android.mk
  4. AndroidManifest.xml
  5. proguard.cfg