Merge "Document error for IStorageSession::renameFile" into main

    /**

     * Renames an existing file.

     *

     * The file must not already be opened. (If it is, use `IFile::rename`.)

     * Will return `ILLEGAL_STATE` if the file is already opened. In that case, use `IFile::rename`

     * instead.

     *

     * @currentPath:

     *     path to the file, relative to filesystem root