roll: third_party/pigweed pw_bluetooth_sapphire: Implement IsochronousStream::Write()

Implement support for Write() with tests.

Original-Bug: 311639690
Test: bazelisk run --config=fuchsia //pw_bluetooth_sapphire/fuchsia/host/fidl:test_pkg
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/262793
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: c65f4c1775310862bc66881e5ce48977bd118db9

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 517b964d0349d1..c65f4c17753108
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8716568023256047521
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Idcd39b5a6de5f47d3b3390b71f957e9201ea7870
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/286507
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 517b964..c65f4c1 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 517b964d0349d1f14649d3f1a04c08801f11136e
+Subproject commit c65f4c1775310862bc66881e5ce48977bd118db9