[11] RFR: Enhancement: JDK-8195811:Support FX Swing interop using public API

[Prasanta Sadhukhan]

Hi All,

Please review an enhancement to support openjfx swing interoperability 
once the dependancy of internal jdk classes are removed.
JDK-8202199 <https://bugs.openjdk.java.net/browse/JDK-8202199> provided 
a new "jdk.unsupported.desktop" module in JDK 11 that exports public API 
that is intended to be used by the javafx.swing module
and unbundled OpenJFX is now made to depend on these APIs to support 
interoperation
between Swing and JavaFX components to replace previous use of internal 
APIs when it was part of Oracle JDK.

Bug: https://bugs.openjdk.java.net/browse/JDK-8195811
webrev: http://cr.openjdk.java.net/~psadhukhan/fxswinterop/webrev.3/

Regards
Prasanta