[RNE Rewrite] fix(example): add bottom safe area inset to classification screen

[barhanc]

Description

Follow-up PR to two problems raised in review of #1296

• [RNE Rewrite] feat: add input validation and JSI conversion utilities #1296 (comment)
• [RNE Rewrite] feat: add input validation and JSI conversion utilities #1296 (comment)

It

• Fixes the classification example screen to not overlap with Android navigation buttons.
• Leaves the default YOLO threshold as 0.25 since it is the official recommended default value (see: ultralytics docs)

Introduces a breaking change?

• Yes
• No

Type of change

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Documentation update (improves or adds clarity to existing documentation)
• Other (chores, tests, code style improvements etc.)

Tested on

• iOS
• Android

Testing instructions

• Run the computer-vision app on Android and confirm that there is no overlap with navigation buttons.

Screenshots

Related issues

Checklist

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings

Additional notes