core: added national roaming info for Free Mobile in France

  Users of Free Mobile in France (MCC 208 MNC 15)
  can roam on Orange (MNC 01)

Change-Id: I2c0c3940a72262b1257fb1c2dfdd01da652d2959
base: added national roaming info for Play in Poland

Cherry-picked from OmniROM:
https://gerrit.omnirom.org/#/c/3382/

Users of Play in Poland (MCC 260 MNC 06) can roam on
Plus, T-Mobile, Orange (MNCs 01/02/03)

Change-Id: I8ea62b0ca40bac9ced11802ee8ef583d6392a199
National roaming info for Drei in Austria

3AT roams in T-Mobile AT networks

Change-Id: I915edccf92bcbb088fa25b958eb345c624f61597
National roaming info for yesss! in Austria

Change-Id: I930198d3cb311b23752a8c2f54852ebd48d65b86
National roaming info for 3 in Ireland

Change-Id: I451831f4144b72feac1a38ef1e8693cb947d6d7e
base: added national roaming info for Pepephone in Spain

Users of Pepephone in Spain (MCC 214 MNC 06) can roam on Vodafone ES (MCC 214 MNC 01).

Change-Id: I462e8b6bc7ffdc8bdfc92765178f960c71c8009d
Telephony: Add data rat constant

This event constant is used in DcTracker

Change-Id: I1f9b34a8689c43c2586e9e3a92f0453649775d73
(cherry picked from commit f7ca98035479b670ff51bc9298fd7928a5e0f80d)
(cherry picked from commit f4d8f7b8fa390302b9cc51a5640e017ff393dfcc)
(cherry picked from commit 77d810390fbca8cb1d10bce148035fada414e0eb)