Facebook Android SDK 3.0.2 (see https://developers.facebook.com/android/change-log-3.x)

Summary:
    - Updating project structure to work with ADT v22.

Test Plan: Release testing

Reviewers: clang

Reviewed By: clang

CC: platform-diffs@lists

Differential Revision: https://phabricator.fb.com/D874918
fetch latest FB SDK changes to fix classpath on sample projects