Properly support NCM tethering type on Pixel 6+

Fixes #413.

mobile/src/main/java/be/mygod/vpnhotspot/net/TetherType.kt

@@ -28,6 +28,8 @@ enum class TetherType(@DrawableRes val icon: Int) {
         else -> false
     }
 
+    fun isA(other: TetherType) = this == other || other == USB && this == NCM
+
     companion object : TetheringManager.TetheringEventCallback {
         private lateinit var usbRegexs: List<Pattern>
         private lateinit var wifiRegexs: List<Pattern>

mobile/src/main/java/be/mygod/vpnhotspot/net/TetheringManager.kt

@@ -151,13 +151,6 @@ object TetheringManager {
      */
     @RequiresApi(24)
     const val TETHERING_BLUETOOTH = 2
-    /**
-     * Ncm local tethering type.
-     *
-     * @see startTethering
-     */
-    @RequiresApi(30)
-    const val TETHERING_NCM = 4
     /**
      * Ethernet tethering type.
      *