feat: add phone and media roles, and declare transport and reboot timing

Two endpoint device types had nowhere to go and were filed under
AccessPointDriver for want of anywhere better — a Yealink desk phone and a Sonos
speaker. netOrk reads the access-point role to decide what appears in its
wireless page, its AP profile pickers and its SSID drift view, so both showed up
in all three. PhoneDriver and MediaDriver give them an honest home; each
declares the surface its one existing driver actually implements, so the
contract is real rather than aspirational.

DeviceTypeDriver also gains two class attributes for facts netOrk kept as
hardcoded driver-name sets on its own side (netork#113):

  USES_SSH               whether netOrk reaches the device over SSH or a REST
                         API — transport, which is why it is not a role
  REBOOT_SETTLE_SECONDS  how long a reboot takes before polling is worth
                         attempting again

Both are driver facts and belong with the driver. A new driver is handled
correctly without anyone remembering to extend a list in netOrk.

tests/test_role_contracts.py

@@ -22,7 +22,9 @@ from napalm_device_types import (
     DeviceTypeDriver,
     FirewallDriver,
     HypervisorDriver,
+    MediaDriver,
     OSDriver,
+    PhoneDriver,
     ResidentialGatewayDriver,
     StorageDriver,
     SwitchDriver,
@@ -33,7 +35,9 @@ ROLE_BASES = [
     AccessPointDriver,
     FirewallDriver,
     HypervisorDriver,
+    MediaDriver,
     OSDriver,
+    PhoneDriver,
     ResidentialGatewayDriver,
     StorageDriver,
     SwitchDriver,
@@ -78,6 +82,8 @@ class TestDeclaredMethodsDoNotExistAtRuntime:
             (AccessPointDriver, "get_wireless_config"),
             (OSDriver, "get_processes"),
             (ResidentialGatewayDriver, "get_wan_status"),
+            (PhoneDriver, "get_sip_accounts"),
+            (MediaDriver, "get_playback_state"),
         ],
     )
     def test_absent_until_a_driver_implements_it(self, base, method):