I found a way to fix it!!! After a month and a half of dealing with Google & their promises to forward info to the programmers, ect, and having them seem to just give up, I stumbled on the fix by total accident. I'm still working out all of the details as much of it includes reverting to previous versions of several Gapps (which they can't tell you to try, even though it wouldn't let you with the broken set up), but I found a way to do it without rooting, only a dev option switch. And the missing library is magically available.
Sorry, have been staring at a screen for hours and am a little delerious! I plan to call them in a bit and see if they can/will release the info or update but if not I will post the step by step ASAP. Phone is about to die & I need sleep, lol, but THERE IS HOPE!!! I was able to get Hangouts, Gmail, Drive & several others i tested to work. I was even able to turn on Photo back up again.