Add basic implementation of local device list changes

synapse/federation/transaction_queue.py

synapse/handlers/device.py

synapse/handlers/e2e_keys.py

synapse/handlers/sync.py

synapse/rest/client/v2_alpha/sync.py

synapse/storage/__init__.py

synapse/storage/_base.py

synapse/storage/devices.py

synapse/storage/end_to_end_keys.py

synapse/storage/schema/delta/40/device_list_streams.sql

synapse/streams/events.py

synapse/types.py

tests/handlers/test_typing.py

tests/rest/client/v1/test_rooms.py