RFR: 8309621: [XWayland][Screencast] screen capture failure with sun.java2d.uiScale other than 1 [v2]

[Alexander Zvegintsev]

> The current implementation of screen capture with ScreenCast has some shortcomings in handling ui scale.
> 
> This changeset includes:
> 
> * sun.java2d.uiScale value is now taken into account
> * screen data streams from ScreenCast are provided in native screen resolution regardless of the scale set in the system.
> Now we take that into account and resize the image accordingly.
> * We are now trying all available `restore_token`, since it is is tied to the display, but not to its resolution.
> * Skips the gtk2 part of the ScreenCaptureGtkTest as it is not supported.
> 
> Following tests are no longer failing on Wayland:
> java/awt/Robot/HiDPIScreenCapture/HiDPIRobotScreenCaptureTest.java
> java/awt/Robot/HiDPIScreenCapture/ScreenCaptureGtkTest.java
> java/awt/Robot/HiDPIScreenCapture/ScreenCaptureTest.java
> 
> Other testing also looks good, including manual testing with various scales set in the system(including fractional scaling).

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  fix copyright year

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16027/files
  - new: https://git.openjdk.org/jdk/pull/16027/files/da786357..39662162

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16027&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16027&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16027.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16027/head:pull/16027

PR: https://git.openjdk.org/jdk/pull/16027