[jdk17u] RFR: 8275819: [TableRowAccessibility accessibilityChildren] method is ineffective

[Anton Tarasov]

A fix for slow table accessing (a11y)  that can be critical for long tables.

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Commit messages:
 - Backport b98ed55060b5f3b7832ec28064b04577e3725cc2

Changes: https://git.openjdk.java.net/jdk17u/pull/301/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=301&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275819
  Stats: 101 lines in 2 files changed: 71 ins; 13 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/301.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/301/head:pull/301

PR: https://git.openjdk.java.net/jdk17u/pull/301