[React Native Gallery]: While navigating in the left navigation pane in scan on mode, narrator focus is falling on the decorative images and narrator remains silent.

[agniuks]

Repro-Steps:
Launch the React Native Gallery app.
Navigate to ‘Navigation bar hamburger icon’ button and invoke it.
Now set narrator to scan on mode using caps+space key and navigate.

Actual Result:
While navigating in the left navigation pane in scan on mode, narrator focus is falling on the decorative images and narrator remains silent.

Expected Result:
When user navigate in left navigation pane in scan on mode, narrator focus should not fall on the icons as it is not providing any information to the user.

User impact:
Users with visual impairments who rely on screen reader will face difficulties if narrator focus fall on the decorative images.

Internal bug link: https://microsoft.visualstudio.com/DefaultCollection/OS/_workitems/edit/43361378