Update Tor Browser for Android's Google Play description

TBA's Google Play description still has the sentence: "Give before the end of 2019, and Mozilla will match your gift: https://donate.torproject.org/donate/donate-tbi-gp".

This should be updated.

Trac:
Username: PROTechThor

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information