Xposed persistance support

Persist app_process between installs to make Xposed works without repetive
installation.

Change-Id: Id61784019ad72de7c3eea912bcc30e0a2c95df63
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>
Merge branch 'kitkat' of https://github.com/AOKP/packages_apps_ROMControl into kitkat