[roll] Roll fuchsia [kernel] Introduce ZX_RESTRICTED_OPT_EXCEPTION_CHANNEL

Add a new option to zx_restricted_enter to specify that exceptions
should be delivered using exception channels. This is also the only way
currently implemented to deliver restricted mode exceptions so we also
update all call sites of zx_restricted_enter to provide this option.

Once we add support for in-thread exception handlers, callers can opt
into this method of exception delivery by removing the
ZX_RESTRICTED_OPT_EXCEPTION_CHANNEL option.

Note we could choose to invert this option, such that no options would
default to exception channels and we could add an option to select
in-thread exceptions. We didn't choose this option because it's expected
that once implemented, the in-thread method makes more sense as a
default behavior.

Original-Bug: 121512
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/842465
Original-Revision: fae88f4768a52a40e93752838936e860f7bcf9fb
GitOrigin-RevId: bcf127538881229f258b3cb6a8d8519154191e56
Change-Id: I67cb3d41f27e924b4d619ecfcdb8e458083c7fac
diff --git a/stem b/stem
index 2df6845..ab56356 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="3dda856edac16a5174322c796946e214778a0efa"/>
+             revision="fae88f4768a52a40e93752838936e860f7bcf9fb"/>
   </projects>
   <hooks>
     <hook name="install-environment"