Facebook Android SDK 3.19

Summary: Facebook Android SDK 3.19 (see https://developers.facebook.com/docs/android/change-log-3.x/)

Test Plan: Built ZIP

Reviewers: gokhanc, chrisp, gen, toddkrabach

Reviewed By: toddkrabach

Subscribers: subodh, dmmiller

Differential Revision: https://phabricator.fb.com/D1592127