fix：1、接入合作方的sdk。2、支付逻辑接入sdk中的接口

Assets/Plugins/Android/LauncherManifest.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!-- GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN-->
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.unity3d.player"
     xmlns:tools="http://schemas.android.com/tools"
     android:installLocation="preferExternal">
     <supports-screens
@@ -10,6 +12,7 @@
         android:xlargeScreens="true"
         android:anyDensity="true"/>
 
-    <application android:label="@string/app_name"
+    <application android:extractNativeLibs="true"
+                 android:label="@string/app_name"
                  android:icon="@mipmap/app_icon"/>
 </manifest>