roll: third_party/pigweed: pw_bluetooth_sapphire: Use pw_bytes for endianness conversions

Use pw_bytes constructs instead of endian.h constructs for byte
conversions.

Original-Bug: b/313665184
Test: fx test //src/connectivity/bluetooth/core/bt-host
      Manual test of OOBE, A2DP source+sink on astro
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1075113
GitOrigin-RevId: 310791d0e3636ac71fd13019ed30486054feef63
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/224036
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: cbdf4ece80b860e..e4e974a53ee236d
Roller-URL: https://ci.chromium.org/b/8742117269894036849
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I88faa145642d6247f512c3691d978a20d426d202
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/223821
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 cbdf4ec..e4e974a 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit cbdf4ece80b860ee21942fd9147602c1bee35e82
+Subproject commit e4e974a53ee236d500568e1aa00f42d8406bc932