title: (Android 11) How do I allow an app to access a file in another app's Android/data folder?
body: <p>I have two apps. One app (P) consumes a file with a proprietary extension (say .XXX) and a .json file with instructions for what P will be doing with that other file. The other app (Q) creates those files and intents to P, telling P the path to the .json file, which contains the path to the .XXX file. P then reads the .json file (in Q's directory) and then reads the .XXX file (again, in Q's directory). P does a lot of stuff with the .XXX file, but I don't believe P has to write to it.</p>
  <p>Prior to Android 11, all the files were just in root/MyAppDirectory_Q and it was easy to access/share files between apps. With scoped storage getting more popular, I need to keep all files in the Android/data/com.companyName.MyApp_Q directory.</p>
  <p>How do I intent from Q to P and give P the permissions to access the two files in Q's Android/data folder? I'm doing this in Xamarin, but I'll eventually have to recreate Q in straight Java once it's working.</p>