roll: third_party/pigweed pw_bluetooth_proxy: Add clock facade

Allow overriding the clock in pw_bluetooth_proxy for types other than
SystemClock.

NO_IFTTT=No Android.bp changes required

Test: bazel test //pw_bluetooth_proxy/...
Test: GN build and tests passed in out/gn
Test: CMake build and tests passed in out/cmake
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/395792
Original-Revision: dee4edd791d71dc287fa70ceaedbeb99f2af62f9

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 87fd1d9ba4b53f..dee4edd791d71d
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8682317182665736529
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7e7816dfa55c2d674be83357311d20601733e4ad
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/408713
diff --git a/third_party/pigweed b/third_party/pigweed
index 87fd1d9..dee4edd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 87fd1d9ba4b53fcc13087d45f9c8d201db1c1802
+Subproject commit dee4edd791d71dc287fa70ceaedbeb99f2af62f9