<AWT Dev> RFR: 8256111: Create implementation for NSAccessibilityStaticText protocol

[Pankaj Bansal]

Create implementation for NSAccessibilityStaticText protocol

For testing that Label accessibility works fine, I have used something like https://docs.oracle.com/javase/tutorial/uiswing/examples/components/LabelDemoProject/src/components/LabelDemo.java. I also tried few other labels with html text. I have verified that the Voice Over output for JLables is same before and after this change.

The class CommonTextAccessibility has most of the code taken from JavaTextAccessibility. Only the functions needed for StaticTextAccessibility have been taken as of now. Few more (not all) functions will be added to this class from JavaTextAccessiblity when work is done for NavigableStaticText or TextField, TextArea, Text, Password etc accessibility roles.

I could not see AccessibleRole.HYPERLINK or "hyperlink" role being used anywhere. As we are reworking the implementation, I have included both roles "label" and "hyperlink" as of now.

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Commit messages:
 - 8256111: Create implementation for NSAccessibilityStaticText protocol

Changes: https://git.openjdk.java.net/jdk/pull/2147/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2147&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256111
  Stats: 272 lines in 5 files changed: 270 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2147.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2147/head:pull/2147

PR: https://git.openjdk.java.net/jdk/pull/2147