RFR: 8250859: Address reliance on default constructors in the Accessibility APIs [v2]

[Conor Cleary]

> This issue relates to JDK-8250639 '☂ Address reliance on default constructors in the java.desktop module'. The
> following classes have had an explicit no-arg constructor added, with a protected access modifier and accompanying API
> description:
>  - Default ctor on com.sun.java.accessibility.util.SwingEventMonitor
>  - Default ctor on javax.accessibility.AccessibleContext
>  - Default ctor on javax.accessibility.AccessibleHyperlink
> 
> The following classes have had an explicit no-arg constructor added, with a public access modifier and accompanying API
> description:
>  - Default ctor on javax.accessibility.AccessibleResourceBundle
>  - Default ctor on com.sun.java.accessibility.util.AWTEventMonitor
>  - Default ctor on com.sun.java.accessibility.util.AccessibilityEventMonitor
>  - Default ctor on com.sun.java.accessibility.util.AccessibilityListenerList
>  - Default ctor on com.sun.java.accessibility.util.EventID
> 
> specdiff:
> http://cr.openjdk.java.net/~ccleary/issues/webrevs-store/8250859/webrevs/webrev.00/specdiff/overview-summary.html bug:
> https://bugs.openjdk.java.net/browse/JDK-8250859

Conor Cleary 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:

 - 8250859: Added no-arg constructor to SwingEventMonitor.java
 - Merge remote-tracking branch 'origin/master' into JDK-8250859
 - Merge remote-tracking branch 'origin/master' into JDK-8250859
 - 8250859: Address reliance on default constructors in the Accessibility APIs

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/174/files
  - new: https://git.openjdk.java.net/jdk/pull/174/files/a2946aca..bc02a4de

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=174&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=174&range=00-01

  Stats: 2012 lines in 47 files changed: 486 ins; 1201 del; 325 mod
  Patch: https://git.openjdk.java.net/jdk/pull/174.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/174/head:pull/174

PR: https://git.openjdk.java.net/jdk/pull/174