Android: Add qmltooling plugins to apk

Task-number: QTCREATORBUG-10560

Change-Id: Ifabe6a74552dbc74b1de3030f8d60efda865f84a
Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>