remove old servers when update subscription (#5424)

* remove old servers when update subscription

* Supplementary Submission: Multiple Configuration Scenarios

Author: Q7DF1

V2rayNG/app/src/main/java/com/v2ray/ang/handler/AngConfigManager.kt

@@ -372,6 +372,7 @@ object AngConfigManager {
                     JsonUtil.fromJson(server, Array<Any>::class.java) ?: arrayOf()
 
                 if (serverList.isNotEmpty()) {
+                    MmkvManager.removeServerViaSubid(subid)
                     var count = 0
                     for (srv in serverList.reversed()) {
                         val config = CustomFmt.parse(JsonUtil.toJson(srv)) ?: continue
@@ -392,6 +393,7 @@ object AngConfigManager {
                 val config = CustomFmt.parse(server) ?: return 0
                 config.subscriptionId = subid
                 config.description = generateDescription(config)
+                MmkvManager.removeServerViaSubid(subid)
                 val key = MmkvManager.encodeServerConfig("", config)
                 MmkvManager.encodeServerRaw(key, server)
                 return 1
@@ -403,6 +405,7 @@ object AngConfigManager {
             try {
                 val config = WireguardFmt.parseWireguardConfFile(server) ?: return R.string.toast_incorrect_protocol
                 config.description = generateDescription(config)
+                MmkvManager.removeServerViaSubid(subid)
                 val key = MmkvManager.encodeServerConfig("", config)
                 MmkvManager.encodeServerRaw(key, server)
                 return 1