odoo-survey-addons/survey_custom_matrix/views/survey_user_input_line.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

  <record id="survey_user_input_line_form" model="ir.ui.view">
    <field name="name">survey_custom_matrix survey.user_input_line form</field>
    <field name="model">survey.user_input_line</field>
    <field name="inherit_id" ref="survey.survey_user_input_line_form"/>
    <field name="arch" type="xml">
      <field name="value_text" position="after">
        <field name="value_dropdown" attrs="{'invisible': [('answer_type','!=','dropdown')]}"/>
        <field name="matrix_subtype_id"/>
      </field>
      <field name="value_suggested" position="replace">
        <field name="value_suggested" colspan='2' attrs="{'invisible': [ ('answer_type','!=','suggestion'), ('matrix_subtype_id', '!=', 'custom_row')]}"/>
      </field>
    </field>
  </record>

</odoo>