Xposed persistance support

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

Change-Id: If58f72f071456db4ecb2c9161eecca4ddcc18787
Signed-off-by: kecinzer <kecinzer@gmail.com>
Merge branch 'jb-mr2' of https://github.com/AOKP/packages_apps_ROMControl into HEAD