Replace user.others to user.data

[marandaneto]

Description

sentry-dart/flutter/android/src/main/kotlin/io/sentry/flutter/SentryFlutterPlugin.kt

Lines 278 to 285 in fe217ba

	(user["extras"] as? Map<String, Any?>)?.let { extras ->
	val others = mutableMapOf<String, String>()
	for ((key, value) in extras.entries) {
	if (value != null) {
	others[key] = value.toString()
	}
	}
	userInstance.others = others

https://github.com/getsentry/sentry-java/releases/tag/6.5.0-beta.2

Blocked till 6.5.0 is GA.