feature: import subscription from v2rayng://install-sub deeplink

V2rayNG/app/src/main/res/values-fa/strings.xml

@@ -234,5 +234,7 @@
         <item>VPN</item>
         <item>فقط پروکسی</item>
     </string-array>
+    <string name="import_subscription_success">اشتراک با موفقیت ذخیره شد</string>
+    <string name="import_subscription_failure">ذخیره اشتراک ناموفق بود</string>
 
 </resources>

V2rayNG/app/src/main/res/values-ru/strings.xml

@@ -239,5 +239,7 @@
         <item>VPN</item>
         <item>Только прокси</item>
     </string-array>
+    <string name="import_subscription_success">подписка успешно импортирована</string>
+    <string name="import_subscription_failure">не удалось импортировать подписку</string>
 
 </resources>

V2rayNG/app/src/main/res/values-zh-rCN/strings.xml

@@ -234,5 +234,7 @@
         <item>VPN</item>
         <item>仅代理</item>
     </string-array>
+    <string name="import_subscription_success">订阅导入成功</string>
+    <string name="import_subscription_failure">导入订阅失败</string>
 
 </resources>

V2rayNG/app/src/main/res/values/strings.xml

@@ -212,6 +212,9 @@
     <string name="connection_connected">Connected, tap to check connection</string>
     <string name="connection_not_connected">Not connected</string>
 
+    <string name="import_subscription_success">Subscription imported Successfully</string>
+    <string name="import_subscription_failure">Import subscription failed</string>
+
     <string-array name="share_method">
         <item>QRcode</item>
         <item>Export to clipboard</item>