I am trying to add HSTS to webview in my app, I tried editing network_security_config.xml as follows
<domain-config hstsEnforced = "true">
<domain includeSubdomains="true">xxx.xxx.xxx</domain>
<pin-set expiration="2019-05-24">
<pin digest="SHA-256">sha_pin</pin>
</pin-set>
</domain-config>
as described in this post here
But still no luck.