Refactor SurveyHandler to use Event.analyticsException event for logging errors

[eliasyishak]

Related to:

• New event for internal usage within package for logging errors; UnifiedAnalyticsError #167

There was already work done to send events for the LogHandler and Session classes in #229, however, adding this feature to the SurveyHandler requires a lot more of a refactor of the class so that we can easily pass the Analytics instance to it to send the events

The code block below shows how we are currently initializing the survey handler for tests

        analytics = Analytics.test(
          tool: DashTool.flutterTool,
          homeDirectory: homeDirectory,
          measurementId: 'measurementId',
          apiSecret: 'apiSecret',
          dartVersion: 'dartVersion',
          fs: fs,
          platform: DevicePlatform.macos,
          surveyHandler: FakeSurveyHandler.fromList(
            homeDirectory: homeDirectory,
            fs: fs,
            initializedSurveys: <Survey>[
              Survey(
                uniqueId: 'uniqueId',
                startDate: DateTime(2023, 1, 1),
                endDate: DateTime(2023, 12, 31),
                description: 'description',
                snoozeForMinutes: 10,
                samplingRate: 1.0,
                excludeDashToolList: [],
                conditionList: <Condition>[
                  Condition('logFileStats.recordCount', '>=', 50),
                  Condition('logFileStats.toolCount.flutter-tool', '>', 0),
                ],
                buttonList: [],
              ),
            ],
          ),
        );

In the above example, we are passing a constructor for the SurveyHandler to the Analytics.test constructor. For the LogHandler and Session, we initialize these variables within the constructor body making it easy for us to pass this as a parameter. Example for how we configure LogHandler below

    // This is within the constructor body so we can reference "this"
    _logHandler = LogHandler(
      fs: fs,
      homeDirectory: homeDirectory,
      analyticsInstance: this,
    );