fix(storage): handle SAF providers without persistable grants

[SamoTech]

Fixes #3114.

Problem

Selecting a folder through certain non-system Storage Access Framework (SAF) providers can crash CloudStream with a SecurityException when takePersistableUriPermission() is called without a persistable permission grant.

Changes

• Catch SecurityException when attempting to acquire persistable URI permissions.
• Log the exception and continue processing the selected folder URI.
• Preserve the existing folder-selection callback and path handling.

Limitations

This change prevents the reported crash but does not guarantee persistent access when a provider grants only temporary permissions. The selected folder may become inaccessible after those permissions expire.

Validation

• Verified the change against the reported logcat exception and its call site.
• Local Gradle build and automated tests have not been run.

AI assistance was used during development.

[fire-light42]

Thank you for the crash fix!