Dialer: Introduce usage pattern stats for retail

For retail devices (and installer builds), introduce tags to be read
by a separate, additional, package. 

This will not be read or collected in any community (nightly/M/etc) or 
self-built build. 

Change-Id: I9ca075c2726867d693c1f16700abe6f6aa276445
Merge "Dialer: Introduce usage pattern stats for retail" into cm-11.0
[2/2] Dialer: Add a non-intrusive dialoger for incoming calls

Change-Id: Ibbb9653b4a1da12fe3a7ad8f98ecbb8bffb13311