ALWAYS MAKE BACKUP!!!!

That fee is really low can't even put it here on free accelerator https://pool.viabtc.com/tools/txaccelerator/ (Your fee 0.00000676BTC needed at least  0.0001BTC)

Best I can advise you is to try to speed it up with https://pushtx.btc.com/#/ tho this is paid service, you need transaction to confirm before it gets out of the memory pool ("a place" where all unconfirmed transactions wait to be confirmed).which is the problem if it doesn't confirm in few days. Tho this can be a bit expensive around $237.27

This wallet is not advised specially because it lacks of features - it is okay since it connects directly to nodes but try to avoid it - I know late now but transaction is already sent. I am not sure if it keeps file on your phone will need to check it out, if i find something I will make new post here but not sure if it's possible having in mind that you have reinstalled it I doubt that there are any left overs --> maybe best would be to try to recover deleted files DON'T USE IT MUCH as more things you write on hard drive/disk the higher chance that you lost your file forever (if you want me I can advise you how you could do the recovery or simply go to the professional).

Best I could tell you is to try to contact some pool - be aware of FAKE ACCELERATORS out there, I am sure that this btc.com one that I linked is legit.