ANDROID: Open-code OWNERS emails for now

The group account on gerrit doesn't quite behave like we thought it
would..

Exempt-From-Owner-Approval: OWNERS bug

Bug: 161933860
Change-Id: Ic72a3126c51d16d38e9fb3d56a2065d1837785e5
Signed-off-by: Alistair Delva <adelva@google.com>