RFR: 8260616: Removing remaining JNF dependencies in the java.desktop module

[Phil Race]

This completes the desktop module JNF removal

* remove  -framework JavaNativeFoundation from make files

* remove  #import <JavaNativeFoundation/JavaNativeFoundation.h> from all source files. If needed add import of JNIUtilities.h to get jni.h definitions - better anyway since then it gets the current JDK ones not the ones from the O/S

* replace JNFNSToJavaString with NSStringToJavaString and  JNFJavaToNSString with JavaStringToNSString

* replace JNFNormalizedNSStringForPath with NormalizedPathNSStringFromJavaString and JNFNormalizedJavaStringForPath with NormalizedPathJavaStringFromNSString

* replace JNFGet/ReleaseStringUTF16UniChars with direct calls to JNI

* Map all JNFRunLoop perform* calls to the ThreadUtilities versions (the vast majority already did this)

* Redo the ThreadUtilities calls to JNFRunLoop to directly invoke NSObject perform* methods.

* define new javaRunLoopMode in ThreadUtilities to replace the JNF one and use where needed.

* Remove the single usage of JNFPerformEnvBlock

* replace JNFJavaToNSNumber in single A11Y file with local replacement

* replace single usage of JNFNSTimeIntervalToJavaMillis in ScreenMenu.m with local replacement

* remove un-needed JNFRunLoopDidStartNotification from NSApplicationAWT.m

* misc. remaining cleanup (eg missed JNF_CHECK_AND_RETHROW_EXCEPTION)

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Commit messages:
 - 8260616: Removing remaining JNF dependencies in the java.desktop module

Changes: https://git.openjdk.java.net/jdk/pull/2305/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2305&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260616
  Stats: 431 lines in 71 files changed: 196 ins; 96 del; 139 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2305.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2305/head:pull/2305

PR: https://git.openjdk.java.net/jdk/pull/2305