Also allow hidden method access.

http://review.cyanogenmod.org/#/c/49689/ requires the chips library to
need access to hidden methods, so the email app needs access to those
too.

Change-Id: If11c44b99a650f0fab958d37a3cdedc6cee3a317
Merge branch 'cm-10.2' of https://github.com/CyanogenMod/android_packages_apps_Email into DJL10.2