[roll third_party/pigweed] pw_rpc: packets.ts

Add helper functions for encoding/decoding pw_rpc packets in typescript.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57845

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 77f2f358c38a80c..d464911581b2fca
Roller-URL: https://ci.chromium.org/b/8837442706067793921
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837442706067793921
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I83291da99b7d718d8789d69a97984d1e08aafebc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/59020
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/third_party/pigweed b/third_party/pigweed
index 77f2f35..d464911 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 77f2f358c38a80c41b6cf33a9efb0cfa01bc2607
+Subproject commit d464911581b2fcab90da60cdc33a5b123f65d699