RFR: 8342456: Remove calls to doPrivileged in javafx.graphics/other [v3]

[Kevin Rushforth]

On Fri, 1 Nov 2024 09:37:19 GMT, Lukasz Kostyra <lkostyra at openjdk.org> wrote:

>> This PR removes uses of `AccessControler.doPrivileged()` from `javafx.graphics` package. All uses of `doPrivileged()` were removed _excluding_ `com.sun.javafx.tk` and `com.sun.ui.glass` subpackages - those are handled by [JDK-8342453](https://bugs.openjdk.org/browse/JDK-8342453) (already completed) and [JDK-8342454](https://bugs.openjdk.org/browse/JDK-8342454) respectively.
>> 
>> Most of these changes are fairly straightforward and follow the standard replacement from `AccessController.doPrivileged(LAMBDA)` to just simply `LAMBDA` with a couple exceptions:
>> 
>> - `StyleManager.java` where `loadStylesheet()` followed two steps - attempting straightforward stylesheet load via `loadStylesheetUnPrivileged()` and in case of `AccessControlException` retrying the load via `AccessController.doPrivileged` with read-only access to stylesheet JAR. Now that `doPrivileged` is deprecated and not used anymore, `loadStylesheetUnPrivileged()` was always successful and the fallback became essentially dead code. Fallback was removed and `loadStylesheetUnPrivileged()` was renamed to `loadStylesheet()`.
>> - `Scene.java` integrates with `com.sun.javafx.tk` so only straightforward `doPrivileged()` calls were removed - `AccessControlContext` remained, as it needs to be removed from both tk and Scene via a follow-up ([JDK-8342993](https://bugs.openjdk.org/browse/JDK-8342993))
>> 
>> Building graphics module now produces less warnings than before this change with no new warning messages (all warnings refer to the use of `Unsafe` which is out of scope of this change).
>
> Lukasz Kostyra has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review fixes

Marked as reviewed by kcr (Lead).

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PR Review: https://git.openjdk.org/jfx/pull/1619#pullrequestreview-2410008691