Change monitor checks to warnings in verifier.

Allows Whatsapp to install properly.

Bug: 11335470
Bug: 11476436
Public bug: https://code.google.com/p/android/issues/detail?id=61792

Change-Id: I2d9b9deaa0126d3dbd6bbfb2babfc15acceed01b
(cherry picked from commit 2bd5c233)