when xprivacy is not eanbled in xposed installer, open modules section in xposed installer directly

Note: module is an extendend feature, which describes in https://github.com/rovo89/XposedInstaller/pull/194
move xposed-installer-related codes from util
Merge pull request #1712 from liudongmiao/patch-open-xposed-installer

Open modules section in xposed insataller