Do you remember where you install Electrum on your phone, on internal memory or maybe SD card? If you hard reset your phone then you wipe that data, and since you have no seed it is difficult for you to hope to return your deleted data. Depending on the amount that was in that wallet you may consider advice from nc50lc and try some data recovery service.

Regarding daty directory, by some users it should be at : /data/data/org.electrum.electrum/files/data/wallets , but you need to have rooted phone in order to find it.