Allow HTTPS-Only Mode to be enabled

This policy controls whether users can enable HTTPS-Only Mode (Always Use Secure Connections) in Settings. HTTPS-Only Mode upgrades all navigations to HTTPS. If this setting is not set or set to "allowed", users will be allowed to enable HTTPS-Only Mode. If this setting is set to "disallowed", HTTPS-Only Mode will be disabled. If this setting is set to "force_enabled", HTTPS-Only Mode will be enabled in Strict mode. If this setting is set to "force_balanced_enabled", HTTPS-Only Mode will be enabled in Balanced mode. "force_enabled" is supported from M112 onwards, "force_balanced_enabled" is supported from M129 onwards. "force_enabled" and "force_balanced_enabled" can be recommended to users too. HTTPS-Only Mode will be set Strict or Balanced initially but users are allowed to change it. If you set this policy to a value that is not supported by the version of Chrome that receives the policy, Chrome will default to the allowed setting. The separate HttpAllowlist policy can be used to exempt specific hostnames or hostname patterns from being upgraded to HTTPS by this feature. Example value: disallowed