[third_party/pigweed] Roll 2 commits

243ba33cd5434c7 pw_multisink: Add GetUnreadEntriesSize to Drain
4885f584c9a27aa pw_ring_buffer: Add EntriesSize API to Reader

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: da7ee077f24a9bb..243ba33cd5434c7
Roller-URL: https://ci.chromium.org/b/8745889461974872881
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I89a00a9e6a4727951f04859f1b259cbabfc03b7f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/214452
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 da7ee07..243ba33 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit da7ee077f24a9bbaa20d31e59ee62d3cd74b1d00
+Subproject commit 243ba33cd5434c716fd6166e38f6bd606866f679