RFR: 6899304 : java.awt.Toolkit.getScreenInsets(GraphicsConfiguration) returns incorrect values

[anass baya]

Screen number 0 is not always the primary screen, so we’ve removed the code that assumes it is.

We used an existing test and took the following considerations into account for Windows:

- On Windows, undecorated maximized frames are placed over the taskbar.
- On Windows, the top-left corner of an undecorated maximized frame may have negative coordinates (x, y).
- Consider the fractional part after scaling.

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Commit messages:
 - Remove trailing whitespace.
 - delete whitespaces
 - annotations adjustmentx
 - Test to verify that java.awt.Toolkit.getScreenInsets(GraphicsConfiguration) returns xcorrect values
 - Remove extralines
 - Screen number 0 is not always the primary screen
 - Screen number 0 is not always the primary screen.

Changes: https://git.openjdk.org/jdk/pull/23183/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23183&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-6899304
  Stats: 72 lines in 2 files changed: 38 ins; 20 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/23183.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23183/head:pull/23183

PR: https://git.openjdk.org/jdk/pull/23183