RFR: 8165943: LineBreakMeasurer does not measure correctly if TextAttribute.TRACKING is set. [v3]

[Olga Mikhaltsova]

> This is a fix for LineBreakMeasurer. It takes into account the TextAttribute.TRACKING value (not eq 0) while calculating the line breaks.
> 
> Tested on Linux x64, Windows x64, macOS x64 with the reproducer (LineBreakSample.java) attached to JDK-8165943 and the following group of tests:
> `$JTREG_HOME/bin/jtreg -jdk:$BUILD_HOME ./test/jdk/java/awt/font`

Olga Mikhaltsova has updated the pull request incrementally with three additional commits since the last revision:

 - Added an automated test
 - Fix for negative tracking and float
 - Fix manual test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10289/files
  - new: https://git.openjdk.org/jdk/pull/10289/files/1818c7d5..b1b4b146

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10289&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10289&range=01-02

  Stats: 167 lines in 3 files changed: 132 ins; 20 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/10289.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10289/head:pull/10289

PR: https://git.openjdk.org/jdk/pull/10289