add missing import

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -38,6 +38,7 @@ import android.content.IntentFilter;
 import android.content.ServiceConnection;
 import android.content.pm.PackageManager;
 import android.content.res.Resources.NotFoundException;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Parcelable;