Update several scripts

- Update backup format as we might be patching multiple partitions
- Update uninstaller to remove files in persist (sepolicy.rule)
- Better handling for dtb/dtbo partition patching

scripts/addon.d.sh

@@ -70,9 +70,8 @@ main() {
 
   remove_system_su
   find_manager_apk
-  patch_boot_image
+  install_magisk
 
-  cd /
   # Cleanups
   $BOOTMODE || recovery_cleanup
   rm -rf $TMPDIR