Android: Extract data for native style on startup

When Ministro is not in use, we need to extract style
information on startup in order for the native Android style
to work.

The code to extract data from the device is contributed from
the Ministro project.

[ChangeLog][Android] Enable using native style also when
Ministro deployment mechanism is not in use.

Task-number: QTBUG-36019
Change-Id: I2afef5219b4e8fbb2f3e387cbc5e570da1f41011
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>