FakeID vulnerability patch

Patches new security vulnerability labeled "Fake ID" (Google bug
13678484).

The bug allows malicious apps to pretend to be signed by trusted
providers and be loaded as extensions in several contexts such as NFC
access, browser plugins and others.
An excellent explanation can be found on this article
(http://bluebox.com/technical/android-fake-id-vulnerability/) by Jeff
Forristal from Bluebox.

Thanks to Tungstwenty@XDA for original Xposed module
https://github.com/Tungstwenty/FakeIDFix