feat: Add Export internal data documents provider patch

[timschneeb]

This PR adds an universal patch that registers a DocumentsProvider with access to the internal app storage of the patched app. This is useful if you want to inspect or manipulate protected files like databases or shared preferences of an app without root access.

The documents provider is accessible through the system file picker and allows 3rd-party file explorer apps (like MiXplorer) to mount it as a virtual storage device.

This change removes the prior ChangeDataDirectoryLocationPath that tries to accomplish a similar behavior by redirecting the internal data storage to the external data storage, however, it has a few problems. It does not affect file operations in native libraries or in apps with hardcoded /data/data/{pkgName} paths. It also only redirects calls to Context.getDir(), but not getFilesDir(), getCacheDir(), etc.. which also point to the internal app storage.

Screenshots of a patched app in the system file picker

[oSumAtrIX]

There's already another patch ChangeDataDirectoryLocationPath that tries to accomplish a similar behavior by redirecting the internal data storage to the external data storage, however, it has a few problems. It does not affect file operations in native libraries or in apps with hardcoded /data/data/{pkgName} paths. It also only redirects calls to Context.getDir(), but not getFilesDir(), getCacheDir(), etc.. which also point to the internal app storage

Would the patch be subject to be removed in favour of this one?

[timschneeb]

I think it can be removed. This patch provides pretty much the same result, just with a different method.

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