Fix UC_USELESS_CONDITION SpotBugs warnings

Resolves "Condition has no effect" warnings in:
- CodenameOneImplementation.java (Redundant width/height check)
- MathUtil.java (Redundant huge + x > one check)
- Component.java (Redundant isFlatten() || !opaque check)
- HTMLComponent.java (Redundant else/assignment)
- ResourceThreadQueue.java (Simplified boolean check)
- CSSEngine.java (Redundant getUi() != null check)
- CSSParser.java (Redundant EOF check)
- MenuBar.java (Dead code removal for ICS check)
- ComponentGroup.java (Refactored logic)
- Updated generate-quality-report.py to enforce this rule.

Author: google-labs-jules[bot]