Default 5 signal bars on aosp rom

Currently none of the exposed modules currently support 5 signal bars on aosp roms, and so I decompiled one of them and added my own with 5 signal indicators instead of 4. Afterwards I realized that the signal bars are just skipping the "fourth indicator" that I added and just going to full signal. I was wondering if anyone knows where the code needs to be implemented or also if there is another way for me to have 5 working signal indicators on an aosp rom instead of 4.

p.s. if this belongs only in q&a I'm sorry