RFR: JDK-8344057 : Remove doPrivileged calls from unix platform sources in the java.desktop module [v2]

[Harshitha Onkar]

> Post JEP-486 (Permanently Disable the Security Manager) cleanup.
> Calls to java.security.AccessController.doPrivileged are obsolete thus removed in this PR.
> 
> This PR addresses removal of AccessController.doPrivileged() calls from unix-platform files in the java.desktop module. Any SM related imports that are no longer needed are removed.
> 
> This PR is limited to removing doPrivileged() calls and excludes any refactoring, reformatting, or other clean up that is out-of-scope for this fix.
> 
> PS: I have explicitly add comments to the changes where a more watchful review is required.

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  removed PrivilegedAction from UnixPrintJob

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22218/files
  - new: https://git.openjdk.org/jdk/pull/22218/files/2b492306..26112aa7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22218&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22218&range=00-01

  Stats: 8 lines in 1 file changed: 2 ins; 4 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22218.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22218/head:pull/22218

PR: https://git.openjdk.org/jdk/pull/22218