roll: pigweed pw_bluetooth_sapphire: Remove unnecessary handle tracking

Discoveriing a handle for the service changed characteristic is used to
decide whether to attempt to send indications, but is never cleared when
there are no subscribers, so will likely be on after the systems runs
for any reasonable length of time. Instead continue to use the set of
subscribed peers directly.

Test: code removal only; fx test bt-host-gatt-tests
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1009175
GitOrigin-RevId: 01c53083ebf40906508a6126e143651a8c5f94db
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/235316
Original-Revision: 55ff480e6aaddb955fdc4bfbc39f18706ccf340d

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: d63a18b6fb6523..55ff480e6aaddb
Roller-URL: https://ci.chromium.org/b/8736957950228622961
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4528a273a843aaa86443af370efedf6ebdd11cbf
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/235512
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index 8baa2bb..65353fe 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-12.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8736958376165837521.
-    commit = "d63a18b6fb65234b4f778e1e13812ee134464f7e",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8736957950228622961.
+    commit = "55ff480e6aaddb955fdc4bfbc39f18706ccf340d",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -58,8 +58,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-12.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8736958376165837521.
-    commit = "d63a18b6fb65234b4f778e1e13812ee134464f7e",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8736957950228622961.
+    commit = "55ff480e6aaddb955fdc4bfbc39f18706ccf340d",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )