Support basic clients count on Android 9-10

mobile/src/main/java/be/mygod/vpnhotspot/manage/TetherManager.kt

@@ -168,7 +168,7 @@ sealed class TetherManager(protected val parent: TetheringFragment) : Manager(),
         }
         override fun onNumClientsChanged(numClients: Int) {
             this.numClients = numClients
-            if (Build.VERSION.SDK_INT >= 30) data.notifyChange()    // only emits when onCapabilityChanged can be called
+            data.notifyChange()
         }
         override fun onInfoChanged(info: List<Parcelable>) {
             this.info = info
@@ -213,6 +213,9 @@ sealed class TetherManager(protected val parent: TetheringFragment) : Manager(),
                         features = features and bit.inv()
                     } else yield(parent.getText(R.string.tethering_manage_wifi_no_features))
                 }.joinToSpanned())
+        } ?: numClients?.let { numClients ->
+            app.resources.getQuantityText(R.plurals.tethering_manage_wifi_clients, numClients).format(locale,
+                numClients)
         }
         override val text get() = parent.resources.configuration.locale.let { locale ->
             listOfNotNull(failureReason?.let { WifiApManager.failureReasonLookup(it) }, baseError, info.run {

mobile/src/main/res/values-zh-rCN/strings.xml

@@ -66,6 +66,9 @@
     <plurals name="tethering_manage_wifi_capabilities">
         <item quantity="other">已连接 %1$s/%2$d 个设备\n支持功能：%3$s</item>
     </plurals>
+    <plurals name="tethering_manage_wifi_clients">
+        <item quantity="other">已连接 %d 个设备</item>
+    </plurals>
     <string name="tethering_manage_wifi_no_features">无</string>
     <string name="tethering_manage_wifi_client_blocked">已屏蔽 %1$s：%2$s</string>
     <string name="tethering_manage_wifi_copy_mac">复制 MAC</string>

mobile/src/main/res/values-zh-rTW/strings.xml

@@ -71,6 +71,9 @@
     <plurals name="tethering_manage_wifi_capabilities">
         <item quantity="other">已連接 %1$s/%2$d 個設備\n支持功能：%3$s</item>
     </plurals>
+    <plurals name="tethering_manage_wifi_clients">
+        <item quantity="other">已連接 %d 個設備</item>
+    </plurals>
     <string name="tethering_manage_wifi_no_features">無</string>
     <string name="tethering_manage_wifi_client_blocked">已隱藏 %1$s：%2$s</string>
     <string name="tethering_manage_wifi_copy_mac">複製 MAC</string>

mobile/src/main/res/values/strings.xml

@@ -78,6 +78,10 @@
         <item quantity="one">%1$s/%2$d client connected\nSupported features: %3$s</item>
         <item quantity="other">%1$s/%2$d clients connected\nSupported features: %3$s</item>
     </plurals>
+    <plurals name="tethering_manage_wifi_clients">
+        <item quantity="one">%d client connected</item>
+        <item quantity="other">%1d clients connected</item>
+    </plurals>
     <string name="tethering_manage_wifi_no_features">None</string>
     <string name="tethering_manage_wifi_client_blocked">Blocked %1$s: %2$s</string>
     <string name="tethering_manage_wifi_copy_mac">Copy MAC</string>