Enforce java.nio.charset.StandardCharsets against guava Charsets

[Abacn]

StandardCharsets is introduced in JRE 7, and guava Charset is now a delegate to java.nio Charsets, e.g.

https://github.com/google/guava/blob/8bab177c14b6c3faf82d6959a9c774b0d15e7414/guava/src/com/google/common/base/Charsets.java#L67

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[Abacn]

tested that the enforcement is effective

without source code changes, build fails with

> Task :sdks:java:core:checkstyleMain
[ant:checkstyle] [ERROR] /Users/yathu/beam/sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/transforms/providers/LoggingTransformProvider.java:39: You are using guava Charsets, please use Java builtin StandardCharsets. [ForbidGuavaCharset]
...

[github-actions]

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[Abacn]

testInvalidRecordReceived (org.apache.beam.sdk.io.gcp.spanner.changestreams.SpannerChangeStreamErrorTest) failed unrelated flaky test. It passed on the first commit of this PR

[Abacn]

assign set of reviewers

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[Abacn]

This has been causing internal check violation (ref: go/standardcharsets)

[damccorm]

LGTM, thanks!