FlutterPlugin 获取上下文

在Flutter插件开发过程中，有时候需要在FlutterPlugin中获取上下文信息，那可以使用FlutterPluginBinding来获取，代码如下：

package com.anguomob.flutter_plugin_anguo
 
import android.app.Activity
import android.content.Context
import androidx.annotation.NonNull
import com.anguomob.flutter_plugin_anguo.utils.AppUtils
import com.anguomob.flutter_plugin_anguo.utils.FlutterUtils
 
import io.flutter.embedding.engine.plugins.FlutterPlugin
import io.flutter.embedding.engine.plugins.activity.ActivityAware
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result
import io.flutter.plugin.common.PluginRegistry.Registrar
 
/** FlutterPluginAnguoPlugin */
class FlutterPluginAnguoPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
  /// The MethodChannel that will the comm