Use BASIC rather than LE_CREDIT_BASED channel for LE Fixed channels

Bug: 147086339
Test: Send data over SMP
Change-Id: I4d2253a193872235021b3af8488db70447e563eb
diff --git a/system/gd/l2cap/le/internal/link.cc b/system/gd/l2cap/le/internal/link.cc
index 2f147a7..37305fb 100644
--- a/system/gd/l2cap/le/internal/link.cc
+++ b/system/gd/l2cap/le/internal/link.cc
@@ -64,8 +64,7 @@
 
 std::shared_ptr<FixedChannelImpl> Link::AllocateFixedChannel(Cid cid, SecurityPolicy security_policy) {
   auto channel = fixed_channel_allocator_.AllocateChannel(cid, security_policy);
-  data_pipeline_manager_.AttachChannel(cid, channel,
-                                       l2cap::internal::DataPipelineManager::ChannelMode::LE_CREDIT_BASED);
+  data_pipeline_manager_.AttachChannel(cid, channel, l2cap::internal::DataPipelineManager::ChannelMode::BASIC);
   return channel;
 }