roll: third_party/pigweed pw_bluetooth_proxy: Correct Android.bp dependencies

Commit 58bc121c9bcb7b0bbed40c423f90ba659ebfe752 recently migrated this
module to multibuf_v2. While other build systems have separate
`pw_multibuf_v1` and `pw_multibuf_v2 targets`, pw_multibuf/Android.bp
currently keeps the v1 functionality in the `pw_multibuf` target. There
is no `pw_multibuf_v1`.

NO_IFTTT=Build system bugfix

Test: Built an internal Android target
Original-Bug: 450235668
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/330572
Original-Revision: c2e3baab54d937b599fcd92de2aa7ca71669f492

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 949cf60bc31f90..c2e3baab54d937
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8701546695238495921
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5179b39aeb97a9c600ee3d26064aa98dc2e1c443
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/330732
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 949cf60..c2e3baa 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 949cf60bc31f906c8e0ddc52abd8ed119c055735
+Subproject commit c2e3baab54d937b599fcd92de2aa7ca71669f492