[third_party/pigweed] Roll 7 commits

fa8e6c497fa2268 pw_multibuf: Add stream implementation
5c8a3f79b83ef56 pw_channel: Remove max_bytes argument from ReadPol
c3965666758921d pw_multibuf: Add empty() function
4fb184103c05d01 pw_env_setup: Update min Python version to 3.10
b2a514a4ae0d2c5 bazel: Remove the deprecated pw_cc_facade macro
2d735c7ce46d1c0 pw_spi: Update Android.bp to conform with new styl
1f4a92c0cf89704 pw_unit_test: Add duplicate test case

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 088229ce2d5325e..fa8e6c497fa2268
Roller-URL: https://ci.chromium.org/b/8753096935190237553
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2c717eefe6128afb1cebb3c4c4894b9933f5e25b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/197470
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 088229c..fa8e6c4 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 088229ce2d5325e91ef1d5427ce04fdc1e6f5cca
+Subproject commit fa8e6c497fa226871e9f13bb94aa78b5cab32aac