[SB] Always check underlying wifi networks regardless of transport type.

If a user has VPN over W+ (aka VPN over carrier merged), then the main
network capability transports are WIFI|VPN, but we still need to fetch
the underlying network info to correctly show W+ in the status bar and
quick settings tile.

Previously, we only checked underlying network info if the transports
had CELLULAR. This CL removes that condition.

Bug: 352162710
Flag: com.android.systemui.status_bar_always_check_underlying_networks
Test: atest ConnectivityRepositoryImplTest
Change-Id: If02befcd57ff0f43ab215950e8833ca6faa0795a
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index a129ac1..c70b8d9 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -380,6 +380,17 @@
 }
 
 flag {
+    name: "status_bar_always_check_underlying_networks"
+    namespace: "systemui"
+    description: "For status bar connectivity UI, always check underlying networks for wifi and "
+        "carrier merged information, regardless of the sepcified transport type"
+    bug: "352162710"
+    metadata {
+      purpose: PURPOSE_BUGFIX
+    }
+}
+
+flag {
     name: "status_bar_stop_updating_window_height"
     namespace: "systemui"
     description: "Don't have PhoneStatusBarView manually trigger an update of the height in "