[roll third_party/pigweed] pw_bluetooth_proxy: Add ProxyHost::HasSendAclCapability()

Also add AclDataChannel::GetLeAclCreditsToReserve().

Original-Bug: 344030724
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/214101
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 21bcbe67b4552d1..7ddafaf90088efa
Roller-URL: https://ci.chromium.org/b/8745912135211828065
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4b913883eebf4de4280439790805f41af15225a0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/214392
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 21bcbe6..7ddafaf 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 21bcbe67b4552d1699951ba977790824f2c28d57
+Subproject commit 7ddafaf90088efac4c1bc6a56f92f9faa85fdc84