RFR: 8374610: Make ByteArrayOutputStream.ensureCapacity(int) protected [v2]

[Daniel Gredler]

> ByteArrayOutputStream.ensureCapacity(int) is currently private. It would be useful if it were protected, so that it can be more easily extended by subclasses.
> 
> Mailing list discussion: https://mail.openjdk.org/pipermail/core-libs-dev/2026-January/156983.html

Daniel Gredler has updated the pull request incrementally with one additional commit since the last revision:

  Update per latest feedback

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29180/files
  - new: https://git.openjdk.org/jdk/pull/29180/files/ecd31f59..dee9d96a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29180&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29180&range=00-01

  Stats: 66 lines in 2 files changed: 42 ins; 17 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/29180.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29180/head:pull/29180

PR: https://git.openjdk.org/jdk/pull/29180