3.1.0

minSdk goes back to 23. 3.0.0 raised it to 26 and deleted every pre-O code path along with it;
#157 pointed out that this locks out apps
still shipping to 23 without the library gaining anything for it. This release restores those
branches. Apps already on 26+ see no behavioural change.

Version changes:

• minSdk 26 → 23. compileSdk / targetSdk stay at 37 (Android 17).

Restored pre-26 behaviour:

• EXTRA_INITIAL_URI is attached to picker intents only on API 26+ again — addInitialPathToIntent()
  and DocumentFileCompat.getDefaultExternalStorageIntent(). Below 26 the extra was ignored anyway;
  the initialPath parameters carry that note in their KDoc again.
• The DocumentsContract.moveDocument() fast path in moveFolderTo() and moveFileTo() checks for
  API 24+ again before using it.
• getSdCardRootAccessIntent() and the SD-card arm of RequestStorageAccessContract are gated on
  API 24+ again, since neither StorageManager.getStorageVolumes() nor createAccessIntent() exists
  below that.
• Context.dataDirectory falls back to filesDir.parentFile below API 24, where Context.getDataDir()
  is not available.
• DocumentFileCompat.getStorageIds() and StorageType.fromStorageId() no longer consult
  StorageManager.storageVolumes below API 24; they fall back to the storage-ID regex, as before.
• OpenFolderPickerContract persists the URI permission for a picked SD-card root below API 24 again.

API:

• @RequiresApi(24) on DocumentFileCompat.isMountedVolumeId(), StorageAccessManager.resolveBookmark()
  and StorageAccessManager.createBookmark() — all three read StorageManager.getStorageVolumes().
  The rest of StorageAccessManager (ensureAccess, pickFolder, pickFiles, pickMedia,
  createFile, requestStoragePermission) works at 23.

Credit: @LagradOst authored the revert in
#158.

Caveat: the restored pre-26 paths are verified by build, lint and unit tests at minSdk 23, not by
a run on a physical API 23 device. @LagradOst reports the library working for sub-26 users of their app.