feat: enable autonomous emergency braking (autowarefoundation#764)

Signed-off-by: Takayuki Murooka <[email protected]>

autoware_launch/launch/components/tier4_control_component.launch.xml

@@ -4,7 +4,7 @@
   <arg name="lateral_controller_mode" default="mpc"/>
   <arg name="longitudinal_controller_mode" default="pid"/>
   <arg name="use_individual_control_param" default="false"/>
-  <arg name="enable_autonomous_emergency_braking" default="false"/>
+  <arg name="enable_autonomous_emergency_braking" default="true"/>
   <arg name="enable_predicted_path_checker" default="false"/>
 
   <let name="latlon_controller_param_path_dir" value="$(var vehicle_id)" if="$(var use_individual_control_param)"/>