fix：1、添加sdk。2、修复bug

Assets/MaxSdk/AppLovin/Plugins/Android.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 256c985e22a29411eb0001b67f088f11
+guid: 89b0a2f6a5def428db3cabf49d84c69c
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/MaxSdk/AppLovin/Plugins/iOS.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 125fa3d9de30e4a089c720e502224457
+guid: bb4a858754af6429987c9e1de62831c6
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/MaxSdk/AppLovin/Plugins/iOS/MAUnityAdManager.m

@@ -1987,8 +1987,6 @@ static ALUnityBackgroundCallback backgroundCallback;
 
 - (NSString *)requestLatencyMillisFromRequestLatency:(NSTimeInterval)requestLatency
 {
-    if ( requestLatency == -1 ) return @"-1";
-    
     // Convert latency from seconds to milliseconds to match Android.
     long requestLatencyMillis = requestLatency * 1000;
     return @(requestLatencyMillis).stringValue;

Assets/MaxSdk/AppLovin/Plugins/iOS/MAUnityPlugin.mm

@@ -8,7 +8,7 @@
 
 #import "MAUnityAdManager.h"
 
-#define VERSION @"8.6.3"
+#define VERSION @"8.6.2"
 #define NSSTRING(_X) ( (_X != NULL) ? [NSString stringWithCString: _X encoding: NSStringEncodingConversionAllowLossy].al_stringByTrimmingWhitespace : nil)
 
 @interface NSString (ALUtils)