strings/EmptyExtension.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<TrustFrameworkPolicy
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns="http://schemas.microsoft.com/online/cpim/schemas/2013/06"
  PolicySchemaVersion="0.3.0.0"
  TenantId="yourtenant.onmicrosoft.com"
  PolicyId="B2C_1A_Federations"
  PublicPolicyUri="http://yourtenant.onmicrosoft.com/B2C_1A_Federations">
 
  <BasePolicy>
    <TenantId>yourtenant.onmicrosoft.com</TenantId>
    <PolicyId>B2C_1A_TrustFrameworkLocalization</PolicyId>
  </BasePolicy>
 
  <ClaimsProviders>
  </ClaimsProviders>
 
</TrustFrameworkPolicy>