Facebook Android SDK 3.7

Summary: Facebook Android SDK 3.7 (see https://developers.facebook.com/docs/android/change-log-3.x/)

Test Plan: Built ZIP

Reviewers: clang

Reviewed By: clang

CC: glen, platform-diffs@lists

Differential Revision: https://phabricator.fb.com/D1183743
iml update
upgrade to gradle 0.9.+, buildTools 19.0.3, iml update/delete