Add to dialer stats: track actions in the dialer to actually initiate a call

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: Ie0069234589c8d12efd7a98b1dc584d4b0cbbbb7