Check IS privacy policy

_Originally posted by @deniseal in https://github.com/vector-im/element-android/issues/2377#issuecomment-935702912_

Specific to vector.im identity server

https://vector.im/_matrix/identity/v2/terms returns:

{
  "policies": {
    "privacy_notice": {
      "version": "1",
      "en": {
        "name": "Privacy Notice",
        "url": "https://vector.im/identity-server-privacy-notice-1"
      }
    }
  }
}

This is not correct, the URL should be https://element.io/is-privacy-notice instead of https://vector.im/identity-server-privacy-notice-1, but a redirection exists though

• Update the response from this URL on this server

Note: if we update the URL, the users will have to accept again the T&C because the agreement is stored in the account data, per URL. This is maybe why this URL has not been updated.

For every identity servers

Element Android already displays the policies when the user choose an identity server, but after that those policies are not displayed anymore. Even if the user disconnects and connects again to the same Identity Server, policies are not displayed anymore since the agreement is stored in the account data per URL.

• Element Android should display the list of URLs in the discovery screen, In a new expandable section “Identity server policy”, below the Identity server URL

• A link “Policy” is added to the user consent dialog below as a neutral action (on the left). The link open the Discovery screen, with the policy section expanded.

[bmarty]

to confirm, when tapping the item, what should happen?

Same as https://github.com/vector-im/element-android/blob/develop/vector/src/main/java/im/vector/app/features/terms/ReviewTermsFragment.kt#L114

[bmarty]

I was thinking on doing something similar to https://github.com/vector-im/element-android/blob/develop/vector/src/main/java/im/vector/app/features/roomprofile/permissions/RoomPermissionsController.kt#L155