RFR: 8376420: Remove AppContext from javax/swing/ImageIcon.java [v2]

[Phil Race]

> Remove per-AppContext MediaTracker from ImageIcon.java

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8376420

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29433/files
  - new: https://git.openjdk.org/jdk/pull/29433/files/08f95226..477de10f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29433&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29433&range=00-01

  Stats: 12 lines in 1 file changed: 0 ins; 11 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29433.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29433/head:pull/29433

PR: https://git.openjdk.org/jdk/pull/29433