Send full user agent header to server during OIDC authentication and when viewing Account and Device management screens (#4106)

ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift

@@ -37,6 +37,9 @@ class OIDCAuthenticationPresenter: NSObject {
             
             session.prefersEphemeralWebBrowserSession = false
             session.presentationContextProvider = self
+            session.additionalHeaderFields = [
+                "X-Element-User-Agent": UserAgentBuilder.makeASCIIUserAgent()
+            ]
             
             activeSession = session
             session.start()

ElementX/Sources/Screens/Settings/AccountSettings/OIDCAccountSettingsPresenter.swift

@@ -31,6 +31,9 @@ class OIDCAccountSettingsPresenter: NSObject {
         let session = ASWebAuthenticationSession(url: accountURL, callback: .oidcRedirectURL(oidcRedirectURL)) { _, _ in }
         session.prefersEphemeralWebBrowserSession = false
         session.presentationContextProvider = self
+        session.additionalHeaderFields = [
+            "X-Element-User-Agent": UserAgentBuilder.makeASCIIUserAgent()
+        ]
         session.start()
     }
 }