在部分Android手机上，当连接上GATTService后直接requestMtu有可能会造成蓝牙连接中断，随后继续重新连接会报错NeedBLUETOOTHPRIVILEGEDpermission1//扫描成功后连接gatt2BluetoothDevicemRemoteDevice=mBluetoothAdapter.getRemoteDevice(result.getDevice().getAddress(