Revert "Email feedback to android@wikimedia.org."

Reverting pending discussion about using OTRS vs
a Google Group.

This reverts commit 1a2af215cdb1f733a030815e09cfc7f612a19e6d.

Change-Id: I1a35daee21d5932612208aeb436c202b1be52282
Merge "Revert "Email feedback to android@wikimedia.org.""