RFR: 8216358: [accessibility] [macos] The focus is invisible when tab to "Image Radio Buttons" and "Image CheckBoxes"

[Alexander Zuev]

Focus painting for combo box and radio button with custom icon should honour the corresponding property.

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Commit messages:
 - 8216358: [accessibility] [macos] The focus is invisible when tab to "Image Radio Buttons" and "Image CheckBoxes"

Changes: https://git.openjdk.java.net/jdk/pull/7284/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7284&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8216358
  Stats: 19 lines in 2 files changed: 15 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7284.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7284/head:pull/7284

PR: https://git.openjdk.java.net/jdk/pull/7284