Fix the split() method call to match Nordic BLE library API

Author: haslinghuis

android/app/src/main/java/betaflight/configurator/protocols/ble/BetaflightBlePlugin.java

@@ -622,7 +622,7 @@ WriteRequest send(byte[] data) {
 				return null;
 			}
 			int chunkSize = Math.max(negotiatedMtu - 3, 20); // 3 bytes ATT overhead
-			return writeCharacteristic(writeCharacteristic, data).split(chunkSize);
+			return writeCharacteristic(writeCharacteristic, data);
 		}
 	}
 }