Handle new ByteString APIs in SegmentedByteString.
Handle new ByteString APIs in SegmentedByteString.

We're going to need a better mechanism to test this. Perhaps following
the @Parameterized example we're already using for other APIs that have
multiple implementations.

palaniyappanBala/okio,chenrui2014/okio,square/okio,seven332/okio,angcyo/okio,angcyo/okio,msdgwzhy6/okio,sunshinecoast/okio,kilink/okio,v7lin/okio,xubuhang/okio,tempbottle/okio,palaniyappanBala/okio,v7lin/okio,Shedings/okio,CyanogenMod/android_external_square_okio,kilink/okio,tomkdir/okio,patds/okio,CyanogenMod/android_external_square_okio,square/okio,seven332/okio,tempbottle/okio,tomkdir/okio,tejasmanohar/okio,patds/okio,xubuhang/okio,Shedings/okio,tejasmanohar/okio,msdgwzhy6/okio,sunshinecoast/okio,square/okio,chenrui2014/okio