Introduce NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED

On V+, this capability is set by default.
Constrained satellite networks never become the system default network.

Test: CSSatelliteNetworkTest
Bug: 343823469
Change-Id: I020ba48e74f1f180e1807cbe1c066209bedb0454
diff --git a/common/flags.aconfig b/common/flags.aconfig
index 6c3e89d..bc4168b 100644
--- a/common/flags.aconfig
+++ b/common/flags.aconfig
@@ -107,3 +107,11 @@
   description: "Flag for BLOCKED_REASON_NETWORK_RESTRICTED API"
   bug: "339559837"
 }
+
+flag {
+  name: "net_capability_not_bandwidth_constrained"
+  is_exported: true
+  namespace: "android_core_networking"
+  description: "Flag for NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED API"
+  bug: "343823469"
+}