RootCanal: Increase connection timeout to 3sec

The current  value of 1sec is causing flakiness for avatar tests
due to rare mis-scheduled events. This changes increases the value
as a temporary measure until a proper workaround is put in place.

Bug: 282824672
Test: atest avatar
Change-Id: Idcb053f7720a66beb02a33c68c8ef5f66310cb21

tools/rootcanal/model/controller/acl_connection.cc

@@ -33,7 +33,7 @@ AclConnection::AclConnection(AddressWithType address,
       type_(phy_type),
       role_(role),
       last_packet_timestamp_(std::chrono::steady_clock::now()),
-      timeout_(std::chrono::seconds(1)) {}
+      timeout_(std::chrono::seconds(3)) {}
 
 void AclConnection::Encrypt() { encrypted_ = true; }