I got one more questions. As you can check on
https://bchain.info/TRC/ my wallet cointain coins. But this android app is offline (not showing balance). If I will export private keys and lets say import it in future to working android app how it is gonna be? Is it gonna show any coins?
P.S.
Is there any possible to copy manualy blocks to this app?
It is on the blockchain ledger so as long as you can claim (via export and import of private key) that address the coins will be there.
I am not that familiar with Android wallets, but I couldn't find the wallet.dat file for Android. On Windows and Linux you can just move those between and as long as you have the password it works fine.
I think they must use some sort of light client as to not bloat your phone, and that is the reason we are having issues solving the problem.