Update CUSTOM_LUN_FILE from AOSP USB config

AOSP has used a standard USB config for the last 3 years.
Time to update TWRP for devices that still use UMS.

Reference: https://android.googlesource.com/platform/system/core/+/master/rootdir/init.usb.rc

Change-Id: I59690f955a7d6db9ae9d607d46299652b52fe8b8
1 file changed