Release Note: Support Unicode Extension for Collation Settings

The BCP 47 Unicode extension for the `strength` and `normalization` collation settings are now supported in the `java.text.Collator`. If the locale passed to the `getInstance(Locale)` factory method contains `ks` and/or `kk` collation settings, the created `Collator` instance is set to have the strength and the decomposition modes corresponding to the specified strength and normalization settings.