Fix BlueZ MTU Size Error

Add a condition to check if Bleak Client is running on Bluez, and if it
is, to set MTU Size.

Mirrors suggestion by Bleak maintainers in `bleak/examples/mtu_size.py`

Author: glfharris

src/frame_sdk/bluetooth.py

@@ -234,6 +234,10 @@ async def connect(
             self._TX_CHARACTERISTIC_UUID,
         )
 
+        client_name = self._btle_client._backend.__class__.__name__
+        if client_name == "BleakClientBlueZDBus":
+            await self._btle_client._backend._acquire_mtu()
+
     async def disconnect(self) -> None:
         """
         Disconnects from the device.
@@ -430,4 +434,4 @@ async def send_break_signal(self) -> None:
         """
         if not self.is_connected():
             await self.connect()
-        await self._transmit(bytearray(b"\x03"))
+        await self._transmit(bytearray(b"\x03"))