[roll pigweed] pw_rpc: Add PacketMeta:{destination_is_X}

These methods are needed in order to dispatch incoming packets
differently based on whether or not they are targeting servers
or clients.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/107111

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: ef84a24cf0bd58f..4b662fdcc521912
Roller-URL: https://ci.chromium.org/b/8805562089521656209
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iba7124620d5cdb44981c88da3afdb4f047fc8e69
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/107094
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index ef84a24..4b662fd 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit ef84a24cf0bd58f979410d70f0c39cbe6f3b5853
+Subproject commit 4b662fdcc5219122c8b2cb933dd1b4fac03e3ccf