pw_bluetooth: Add AVDTP psm

Bug: 381291639
Change-Id: Iadd4adc7154fceb12950d3fcdbd1ef9fc8f7bd62
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/253234
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Reviewed-by: Ben Lawson <benlawson@google.com>
Docs-Not-Needed: Ben Lawson <benlawson@google.com>
Commit-Queue: Charlie Boutier <charliebout@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Charlie Boutier <charliebout@google.com>
diff --git a/pw_bluetooth/public/pw_bluetooth/l2cap_frames.emb b/pw_bluetooth/public/pw_bluetooth/l2cap_frames.emb
index 7f3247c..9dfee97 100644
--- a/pw_bluetooth/public/pw_bluetooth/l2cap_frames.emb
+++ b/pw_bluetooth/public/pw_bluetooth/l2cap_frames.emb
@@ -141,6 +141,7 @@
   [maximum_bits: 16]
   SDP    = 0x0001  # PSM
   RFCOMM = 0x0003  # PSM
+  AVDTP  = 0x0019  # PSM
   ATT    = 0x001F  # PSM
   EATT   = 0x0027  # PSM or SPSM