Fix crash with ChannelZipContainer before API 26

[mickael-menu]

LinkOption is only available since API 26, so ChannelZipContainer crashed with:

java.lang.NoClassDefFoundError: Failed resolution of: [Ljava/nio/file/LinkOption;
	at org.readium.r2.shared.util.archive.channel.compress.utils.IOUtils.<clinit>(IOUtils.java:46)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.tryToLocateSignature(ZipFile.java:1392)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.positionAtEndOfCentralDirectoryRecord(ZipFile.java:1071)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.positionAtCentralDirectory(ZipFile.java:941)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.populateFromCentralDirectory(ZipFile.java:912)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.<init>(ZipFile.java:526)
	at org.readium.r2.shared.util.archive.channel.compress.archivers.zip.ZipFile.<init>(ZipFile.java:459)
	at org.readium.r2.shared.util.archive.channel.ChannelZipArchiveFactory.create(ChannelZipContainer.kt:191)
	at org.readium.r2.shared.resource.CompositeArchiveFactory.create(Factories.kt:172)
	at org.readium.r2.shared.asset.AssetRetriever.retrieve(AssetRetriever.kt:259)
	at org.readium.r2.testapp.domain.Bookshelf.addBook(Bookshelf.kt:126)
	at org.readium.r2.testapp.domain.Bookshelf.addBookFeedback(Bookshelf.kt:116)
	at org.readium.r2.testapp.domain.Bookshelf.addBookFeedback$default(Bookshelf.kt:112)
	at org.readium.r2.testapp.domain.Bookshelf$addPublicationFromStorage$1.invokeSuspend(Bookshelf.kt:108)

Luckily, LinkOption was not really used, so I just removed the references.

To reproduce, use "Read from shared storage" on an API 25 emulator.