RFR: 8342913: Remove calls to doPrivileged in media

[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.

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

Changes: https://git.openjdk.org/jfx/pull/1612/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1612&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342913
  Stats: 78 lines in 4 files changed: 0 ins; 31 del; 47 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