[jdk21u-dev] RFR: 7001133: OutOfMemoryError by CustomMediaSizeName implementation

[Alexander Scherbatiy]

The fix has been tested on Ubuntu and MacOS.
The test `test/jdk/javax/print/CustomMediaSizeNameOOMETest.java` passes with the fix and fails without the fix.

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Commit messages:
 - Backport 10335f60f923aa4f315e64acb2bfd7bb06d47a1b

Changes: https://git.openjdk.org/jdk21u-dev/pull/349/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=349&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-7001133
  Stats: 173 lines in 5 files changed: 153 ins; 13 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/349.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/349/head:pull/349

PR: https://git.openjdk.org/jdk21u-dev/pull/349