Recepient gets value is sometimes rounded which leads to showing not pericise estimated get amount for bridge transaction

[pavloburykh]

Originally reported here cc @clauxx

Steps:

1. Build L1 - L2 (opt) routes
2. Pay attention at Recepient gets and compare it to the real value which user will receive taking into consideration boundary fee

Expected result: Recepient gets show the percised amount taking into consideration boundary fee

Actual result: in case when boundary fee is very low, we round Recepient gets value so it is not reflecting the pericised get amount.

Additional Information

• Status version: nightly
• Operating System: Android, iOS