Don't fear, I will save you.
This bug literally ruined my life, however I have grown immensely in the process of figuring out how to fix it. All I can say is persistence pays off.... big time.
What I did to get my Nexus 7 2013 (rooted and running android 6.0.1) to finally boot after stupidly disabling/uninstalling the Google voice and Google search app packages, was extract an old Nandroid backup containing undisabled versions of the Google app's corresponding app and data files, and then pasted these folders into their appropriate locations within the device itself using TWRP's recovery file manager.
ZIP WITH FOLDERS LINK:
https://mega.nz/#!ioc2jb5S!Cr54Izn-987p1bma3fCTE_YndJYXk1HKU0DhFLh7TsY
INSTRUCTIONS:
1. Install the newest version of TWRP onto your device.
2. Boot into bootloader mode (recovery/TWRP mode works as well).
3. Connect your device to your computer with the folders ready to be copied over.
4. Copy the two folders into your devices root/internal storage aka the group of folders that appear once you click on your device in windows explorer (most importantly, get them onto your device).
5. Boot into TWRP if not already and click advanced in the lower left-hand corner then file manager.
6. Once in file manager, navigate to the location you copied the two folders onto your phone.
7. Copy the folder with a -# at the end of its file name by clicking on it and then clicking copy folder from the options that pop up.
8. Navigate to /data/app and paste the folder there.
9. Copy the folder withOUT a -# at the end of its file name.
10. Navigate to /data/data and copy the folder there.
11. Boot up your finally working device (you shouldn't see any weird dimming or other odd symptoms during bootup this time)
12. Once booted up, if Google doesn't automatically do this, update the Google app to the newest version
13. Never disable/uninstall/freeze the google app ever again.
14. Just kidding, there actually is a way to disable it without preventing your device from booting, just Google it and you will find it; it would be smarter however to just leave it at that and never uninstall the Google app again.
Good Luck And I Hope This Fixed Your Life/Helped You In Some Way