V2RayVpnService.kt: use setMetered

setMetered to false let VPN network to inherit its meteredness from its underlying networks.

Revert `addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)`

V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayVpnService.kt

@@ -76,7 +76,6 @@ class V2RayVpnService : VpnService() {
         NetworkRequest.Builder()
                 .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                 .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
-                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
                 .build()
     }
 
@@ -198,6 +197,10 @@ class V2RayVpnService : VpnService() {
             listeningForDefaultNetwork = true
         }
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            builder.setMetered(false)
+        }
+
         // Create a new interface using the builder and save the parameters.
         mInterface = builder.establish()
         sendFd()