Fix broken OTGUtil.getDocumentFile()

[TranceLove]

Description

Addresses #4038, that under specific root URI the file/folders should be able to be found correctly.

Previously the code is looking for file by splitting parts of a non-decoded URI against a decoded URI root, e.g.

root URI = content://com.android.externalstorage.documents/tree/primary:Android/data/com.poobslag.turbofat/files
looking file path = content://com.android.externalstorage.documents/tree/primary%3AAndroid%2Fdata%2Fcom.poobslag.turbofat/files

which would most likely fail. This PR fixes it by also decoding the path it is looking for.

Issue tracker

Addresses #4038, as there is still yet to find the way to manipulate the URI root - current implementation of Android/data access is by package, which would still work on Android 13.

Manual tests

• Done

• Device: Pixel 5 emulator

• OS: Android 11

Delete a directory under a certain package in Android/data would work.

Build tasks success

Successfully running following tasks on local:

• ./gradlew assembledebug
• ./gradlew spotlessCheck

[TranceLove]

Pending tasks:

• define scope of regression tests by looking at the places calling OTGUtil.getDocumentFile()
• run and verify all regression tests

[TranceLove]

Regression tests that should pass (wild guess, may be overkill)

• OTG side
  • create folder
  • create file
  • rename folder
  • rename file
  • move folder
  • move file
  • copy folder
  • copy file
  • delete folder
  • delete file
• Android/data/{any packageId}
  • create folder (partially working - folder not visible in Amaze but visible in DocumentsUI)
  • create file
  • rename folder
  • rename file
  • move folder (partially working - folder not visible in Amaze but visible in DocumentsUI)
  • move file (partially working - need to refresh to make original file disappear)
  • move folder from storage to Android/data/{any packageId}
  • move file from storage to Android/data/{any packageId} (partially working - need to refresh to make original file disappear)
  • move folder from Android/data/{any packageId} to storage
  • move file from Android/data/{any packageId} to storage (partially working - need to refresh to make original file disappear)
  • move folder from Android/data/{packageId 1} to Android/data/{packageId 2}
  • move file from Android/data/{packageId 1} to Android/data/{packageId 2}
  • copy folder
  • copy file
  • copy folder from storage to Android/data/{any packageId}
  • copy file from storage to Android/data/{any packageId}
  • copy folder from Android/data/{any packageId} to storage
  • copy file from Android/data/{any packageId} to storage
  • copy folder from Android/data/{packageId 1} to Android/data/{packageId 2}
  • copy file from Android/data/{packageId 1} to Android/data/{packageId 2}
  • delete folder
  • delete file
  • open in text editor
  • update in text editor

File operations between different package IDs are not supported as OTGUtils's design, only one root URI is available.