I don't know if this should be an answer but I just wanted to close this question..
Its NOT possible to do so. Here is the reply to my second query (I re-confirmed because I thought the tech-support guy hadn't gotten what I wanted)
Dear Asim,
This is Seren once again from TomTom Customer Support with your query
reference number 130102-002150.
First of all, I would like to apologize for the inconvenience and the
confusion caused due to my previous reply.
Please be assured that we always have the best of intentions of
providing outstanding customer service to our customers, and we will
do our best to address any issues you may have.
Asim, I have re confirmed with one of my senior team member and like
to inform you that as of now we do not have an app from which you can
be called on from within another Android app.
However, as your suggestion is a very good one. I have taken your
feedback and forwarded to our product management team.
Our Product Managers review all feedback to determine future
enhancements and products. Many of our current products and updates
offer features based on customer suggestions. We certainly value our
esteemed customers like you.
we hope you find this information helpful.
If you have any further query, please get back to us and we will
assist you further.