[roll] Roll fuchsia [bt][metrics] Move more metrics logging to the background

Metrics logging sometimes takes a (very) long time in early boot, so
ensure that the component continues on with it's business while it
waits.

Simplify some AVRCP connection semantics.

Original-Bug: b/254667882
Test: updated tests
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/764252
Original-Revision: 0b8873cc6617c6c61f4fe194323eab717ba1ad5e
GitOrigin-RevId: 6fad39dfa0da709455b4f45ebc09a84d9ff252d3
Change-Id: I7ab7b7dad93301088bd63ab5a17e78da05f954ca
diff --git a/stem b/stem
index 667de98..189a13c 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="ef5d9a88bf6a14ef741bcdae1da44e9c38a52fa8"/>
+             revision="0b8873cc6617c6c61f4fe194323eab717ba1ad5e"/>
   </projects>
   <hooks>
     <hook name="install-environment"