final void overrideMtu(@IntRange(from = 23, to = 517) final int mtu) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
			this.mtu = Math.min(515, mtu);
		}
	}
Returns the current MTU (Maximum Transfer Unit).
ble/src/main/java/no/nordicsemi/android/ble/BleManagerHandler.java