RFR: 6434110: Color constructor parameter name is misleading [v4]

[Sergey Bylokhov]

> Small cleanup: the parameter names in the Color(int, boolean) constructor have been renamed:
>  - rgba -> argb, since this is the format described in the spec
>  - hasalpha -> hasAlpha, to follow common naming conventions
> 
> Also adds a basic test for the constructor.

Sergey Bylokhov 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 four additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-6434110
 - lists via "<ul>" is added
 - review feedback
 - 6434110: Color constructor parameter name is misleading

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/29734/files
  - new: https://git.openjdk.org/jdk/pull/29734/files/f12b4406..6c542211

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29734&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29734&range=02-03

  Stats: 486300 lines in 581 files changed: 243363 ins; 239200 del; 3737 mod
  Patch: https://git.openjdk.org/jdk/pull/29734.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29734/head:pull/29734

PR: https://git.openjdk.org/jdk/pull/29734