RFR: 8333768: Minor doc updates to java.lang.{Float, Double} [v2]

[Joe Darcy]

> Misc small doc updates and addition of `@Overrides` annotations.

Joe Darcy has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8333768
 - JDK-8333768: Minor doc updates to java.lang.{Float, Double}

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19590/files
  - new: https://git.openjdk.org/jdk/pull/19590/files/99f1ade0..cfe77e62

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19590&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19590&range=00-01

  Stats: 8759 lines in 137 files changed: 7210 ins; 936 del; 613 mod
  Patch: https://git.openjdk.org/jdk/pull/19590.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19590/head:pull/19590

PR: https://git.openjdk.org/jdk/pull/19590