add module to "de.robv.android.xposed.installer.OPEN_SECTION" action

This patch add a extra "module" for the request module name, and will be much
easier for disabled xposed module to inform user to enable it in Xposed Installer.

Usage example:

    Intent intent = new Intent("de.robv.android.xposed.installer.OPEN_SECTION");
    intent.setPackage("de.robv.android.xposed.installer");
    intent.putExtra("section", "modules");
    intent.putExtra("module", getPackageName());
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);