RFR: 8279614: The left line of the TitledBorder is not painted on 150 scale factor [v2]

[Alisen Chung]

On Fri, 4 Mar 2022 00:49:39 GMT, Alisen Chung <achung at openjdk.org> wrote:

>> Changed the drawing area to be increased by 0.5 on the left side to prevent clipping
>
> Alisen Chung has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - adjusted pixels to check for border
>  - typo
>  - reverted old change, swapped order of painting to prevent overdrawing

I just added the functions Phil suggested, @azuev-java could you also review?

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PR: https://git.openjdk.java.net/jdk/pull/7449