getRecentDecorView fails on Samsung S3/S5 with MultiWindow support

Summary: Samsung has a different MultiPhoneWindow support, and we don't support it yet, which makes it unable to get the decor view

Test Plan: Test is on Samsung S3/S5 to verify it works

Reviewers: mkonicek

Reviewed By: mkonicek

Differential Revision: https://reviews.facebook.net/D24393