[roll] Roll fuchsia [netdevice] Add eventpair variant to DelegatedRxLease

Add support for `zx.Handle:EVENT`-based event tokens to
`DelegatedRxLease`. This allows `DelegatedRxLease` to hold the latest
format of `LeaseToken` provided by the system `ActivityGovernor`.

Original-Bug: 466406261
Test: fx lsc presubmit

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1441103
Original-Revision: c379070065f325fd4a8a0ac74e5d73334348613e
GitOrigin-RevId: 210d5ab3a3b5236a90c83d2a3df169f553464bc9
Change-Id: I4c2bd3d1d2a9feef8e72c8b018afd37777fb8880

Author: Eric Rahm

stem

@@ -7,7 +7,7 @@
             manifest="manifests/platform"
             root=""
             remote="https://fuchsia.googlesource.com/fuchsia"
-            revision="94d1a9429ddf1f802b41953b81f39f5bab2888b1"/>
+            revision="c379070065f325fd4a8a0ac74e5d73334348613e"/>
   </imports>
   <projects>
     <project name="cobalt"