RFR: 8302797: ArrayIndexOutOfBoundsException in TextRun.getWrapIndex() [v3]

[Phil Race]

> This fixes an the AIOOBE when finding a line break point in RTL laid out glyphs.
> The comment in the bug report explains how we can end up trying to find an unachievable break point and yet there's no "stop" on the search when we've run out of glyphs so hence the exception.
> 
> The fix uses a different method to choose a break point.
> 
> A system test has been supplied which will fail on macOS (even with standard macOS fonts, not just the Noto Sans Arabic) unless the fix is applied.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8302797

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1055/files
  - new: https://git.openjdk.org/jfx/pull/1055/files/ba0f28dc..a1cf482f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1055&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1055&range=01-02

  Stats: 9 lines in 1 file changed: 8 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/1055.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/1055/head:pull/1055

PR: https://git.openjdk.org/jfx/pull/1055