[RUM-9424] Session Replay support for RN 0.79

[marco-saia-datadog]

What does this PR do?

Fixes breaking change in Android Session Replay introduced by RN 0.79.

What changed

The property drawable.borderRadius.uniform is not accessible anymore, as BorderRadiusStyle has been made internal in RN 0.79.

This PR uses reflection to access the same property:

    @OptIn(UnstableReactNativeAPI::class)
    private fun getBorderRadius(drawable: CSSBackgroundDrawable): Float {
        val width = drawable.intrinsicWidth.toFloat()
        val height = drawable.intrinsicHeight.toFloat()
        val uniform = getBorderRadiusUniform(drawable)
        return uniform?.getRadius(width, height) ?: 0f
    }

    @OptIn(UnstableReactNativeAPI::class)
    private fun getBorderRadiusUniform(
        drawable: CSSBackgroundDrawable
    ): LengthPercentage? {
        return reflectionUtils.getDeclaredField(
            drawable.borderRadius,
            UNIFORM_FIELD_NAME
        ) as? LengthPercentage
    }

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[datadog-datadog-prod-us1]

Datadog Report

Branch report: marcosaia/RUM-9424/support-rn-79
Commit report: bdf3d0d
Test service: dd-sdk-reactnative

✅ 0 Failed, 668 Passed, 1 Skipped, 3.67s Total Time