RFR: 8342913: Remove calls to doPrivileged in media [v2]

[Andy Goryachev]

> Removes doPrivileged in the following module:
> 
> - javafx.media
> 
> See JDK-8342441 for details.
> 
> As a helpful hint for reviewers, I recommend reviewing this using the "Hide whitespace" option.

Andy Goryachev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - review comments
 - Merge remote-tracking branch 'origin/master' into 8342913.do.privileged.media
 - Merge remote-tracking branch 'origin/master' into 8342913.do.privileged.media
 - 8342913: Remove calls to doPrivileged in media

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1612/files
  - new: https://git.openjdk.org/jfx/pull/1612/files/72a61560..32f63d73

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1612&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1612&range=00-01

  Stats: 25 lines in 4 files changed: 19 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1612.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1612/head:pull/1612

PR: https://git.openjdk.org/jfx/pull/1612