My bad I didn't see your last post, but I'm glad you finally got it certified. I had the same troubles trying to get it certified.
As for the BlueTooth, I forgot this guide isn't entirely accurate, I followed another one. Here's what I did.
Reboot into TWRP, and mount the vendor folder. Then go back into android, and use the specific app called "Root Browser", its the one with an eye patch, that's the only one that worked for me. Now for the two files, you HAVE to delete the original one, you cant name it (OLD) or something, you have to delete it. Then you rename the new Aura file, you have to rename it too exactly "BluetoothResCommon.apk". if you notice, the order of the words are different than from the one in this guide. the "Res" is inbetween Bluetooth and common, and is not supposed to be at the end.
I hope I explained that well enough. My apologizes for misdirecting you. Update me if you get it working!