RFR: 8272805: Avoid looking up standard charsets [v2]

[Sergey Bylokhov]

On Thu, 26 Aug 2021 17:39:36 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Sergey Bylokhov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 14 additional commits since the last revision:
>> 
>>  - Update the usage of Files.readAllLines()
>>  - Update datatransfer
>>  - Merge branch 'master' into standard-encodings-in-non-public-modules
>>  - Merge branch 'master' into standard-encodings-in-non-public-modules
>>  - Fix related imports
>>  - Merge branch 'master' into standard-encodings-in-non-public-modules
>>  - Cleanup UnsupportedEncodingException
>>  - Update PacketStream.java
>>  - Rollback TextTests, should be compatible with jdk1.4
>>  - Rollback TextRenderTests, should be compatible with jdk1.4
>>  - ... and 4 more: https://git.openjdk.java.net/jdk/compare/e5c71cd0...e7127644
>
> Can somebody take a look too the changes in the "jdk.attach", "jdk.hotspot.agent" and IdealGraphVisualizer?

> @mrserb Not sure if it applies but there are couple of classes in `java.xml` that use charset names instead of standard charsets. 
> would it make sense to go through them as well?

Most of the cases in the XML module are related to the Xerces library, I have skipped it to make the future merges from upstream of that library simpler.

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PR: https://git.openjdk.java.net/jdk/pull/5210