RFR: 8288589: Files.readString ignores encoding errors for UTF-16

[Iris Clark]

On Thu, 23 Jun 2022 16:12:31 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [2728770e](https://urldefense.com/v3/__https://github.com/openjdk/jdk/commit/2728770e3d73bb11c4d6e54b5aff91588a1a780b__;!!ACWV5N9M2RV99hQ!JWTXtcOlxAlKs1OamoE2hbweIBcqRBtUZoAQmPyrENX5-6Dr9ygPxqGcpC9F_ATb8jBkILMiisolDKuTAoQu$ ) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Naoto Sato on 23 Jun 2022 and was reviewed by Roger Riggs, Iris Clark and Alan Bateman.
> 
> Thanks!

Looks like a clean backport of the change in main-line.

-------------

Marked as reviewed by iris (Reviewer).

PR: https://git.openjdk.org/jdk19/pull/61