RFR: 8378050: Add missing @Override annotations in "java.awt.color" package

[Sergey Bylokhov]

This patch adds missing `@Override` annotations to methods in the `java.awt.color` package that override methods from a superclass or interface.
Only source annotations are added; there are no behavioral changes.

The previous patch for com.sun.beans can be found here: https://github.com/openjdk/jdk/pull/27887.

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Commit messages:
 - 8378050: Add missing @Override annotations in "java.awt.color" package

Changes: https://git.openjdk.org/jdk/pull/29749/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29749&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378050
  Stats: 13 lines in 3 files changed: 10 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/29749.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29749/head:pull/29749

PR: https://git.openjdk.org/jdk/pull/29749