Connect, Disconnect, and Move To methods don't accurately report the result

[KosmicAnomaly]

The player tends to think that it is a voice channel when it isn't (reproduce by manually disconnecting inside of Discord) or say that it was able to connect/move to a voice channel even if it wasn't (reproduce by having it connect to a channel that it does not have perms to connect to).

Proposal: Re-write the methods in the player class to work something along the lines of the methods below, where it checks the result afterwards to see if it is the expected result.

async def connect(self, *, timeout: float, reconnect: bool) -> None:
    await self.guild.change_voice_state(channel=self.channel, self_deaf=True)
    if self.user.id in [m.id for m in self.channel.members]:
        self._connected = True
    else:
        self._connected = False
        self.channel = None
        raise asyncio.TimeoutError

async def disconnect(self, *, force: bool = False) -> None:
    try:

        await self.guild.change_voice_state(channel=None)
        self._connected = False
        self.channel = None
    finally:
        with contextlib.suppress(ValueError):
            self.node._players.remove(self)

        self.cleanup()

async def move_to(self, channel: VoiceChannel) -> None:
    await self.guild.change_voice_state(channel=channel)
    if self.user.id in [m.id for m in channel.members]:
        self._connected = True
        self.channel = channel
    else:
        self._connected = False
        self.channel = None
        raise asyncio.TimeoutError

def is_connected(self):
    if not self.channel:
        return False
    if self.user.id in [m.id for m in self.channel.members]:
        return True
    return False