Android: Increase timeouts for keytool

Such a long timeout isn't nice since this is run in the gui thread.
But better than failing and typically it shouldn't need to block for
4s.

Task-number: QTCREATORBUG-10944
Change-Id: I1d3f842de8119603fa165878a14afc96a04c0c2a
Reviewed-by: Eike Ziller <eike.ziller@digia.com>