Introducing a new formatting class for locale-dependent list patterns. The class is to provide the functionality from the Unicode Consortium's LDML specification for [list patterns](https://www.unicode.org/reports/tr35/tr35-general.html#ListPatterns). For example, given a list of String as "Monday", "Wednesday", "Friday", its `format` method would produce "Monday, Wednesday, and Friday" in US English. A CSR has also been drafted, and its draft javadoc can be viewed here: https://cr.openjdk.org/~naoto/JDK-8041488-ListPatterns-PR/api.00/java.base/java/text/ListFormat.html
------------- Commit messages: - Initial commit Changes: https://git.openjdk.org/jdk/pull/15130/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15130&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8041488 Stats: 679 lines in 6 files changed: 671 ins; 0 del; 8 mod Patch: https://git.openjdk.org/jdk/pull/15130.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15130/head:pull/15130 PR: https://git.openjdk.org/jdk/pull/15130
