Introduce TETHERING_VIRTUAL type

Bug: 340376953
Test: Presubmit
Change-Id: I0714b62ebfc63fc966d7873ebdd68ae72c015bc4
diff --git a/Tethering/common/TetheringLib/api/system-current.txt b/Tethering/common/TetheringLib/api/system-current.txt
index a287b42..cccafd5 100644
--- a/Tethering/common/TetheringLib/api/system-current.txt
+++ b/Tethering/common/TetheringLib/api/system-current.txt
@@ -47,6 +47,7 @@
     field public static final int TETHERING_INVALID = -1; // 0xffffffff
     field public static final int TETHERING_NCM = 4; // 0x4
     field public static final int TETHERING_USB = 1; // 0x1
+    field @FlaggedApi("com.android.net.flags.tethering_request_virtual") public static final int TETHERING_VIRTUAL = 7; // 0x7
     field public static final int TETHERING_WIFI = 0; // 0x0
     field public static final int TETHERING_WIFI_P2P = 3; // 0x3
     field public static final int TETHER_ERROR_DHCPSERVER_ERROR = 12; // 0xc