("Is this thing on?")

This reverts commit 63a5b5bc.

The Android build for 8.5a8 is not yet signed, so we point to version
8.5a7 until we sign it.

which fixes some of the fake keys on the signing key page :/

Tor Browser for Android is now using the same version number as the
others alpha Tor Browser bundles, and is in the same directory on
dist.tpo.