Bug fix - Gesture navigation overriding Slider

[lonewolf2208]

Purpose / Description

Dragging the Previewer slider from the screen edges can trigger Android’s back gesture instead of moving the slide .

Fixes

• Fixes Previewer: Gesture navigation overrides interacting with the Slider #20397

Approach

I initially tried requestDisallowInterceptTouchEvent() while dragging the slider, but that did not fully solve the issue because the system back gesture could still win before the slider started tracking the touch.

The final fix uses ViewCompat.setSystemGestureExclusionRects() on the slider bounds, and refreshes that rect after layout changes. That prevents edge back gestures from taking over when the user starts dragging from either end of the slider.

How Has This Been Tested?

Tested the changes manually -

After	Before
Screen_recording_20260308_230542.mp4	Screen_recording_20260308_224742.mp4

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[lonewolf2208]

Set the gesture exclusion area once the slider has its final size

[david-allison]

Prefer code comments, rather than GitHub comments

If it's useful for reviewers, it'll be useful for future maintainers in the codebase

[lonewolf2208]

Update the exclusion area again if the slider layout changes later

[david-allison]

This is excellent, thank you!!!

---

I was concerned that this would block gestures while the indicator was away from the edges.

vertical phone ✅
If the indicator is not touching an edge, no matter how close to the edge a user taps, the toggle moves to the extremity, so navigation gestures should not occur

horizontal phone ✅
Swiping on the notch performs a navigation gesture

[BrayanDSO]

Looks great. Thanks