Please:
1. rename to __preferred_masks__,
2. move the definition here into _telephony/android_modem.c_ as well, and we'll also need `android_{parse,get}_modem_preferred_mask()`,
3. add a new enum type __AModemPreferredMask__ for each entry in this array,
4. add all entries available in [hardware/ril/reference-ril/reference-ril.c:net2pmask](https://github.com/mozilla-b2g/platform_hardware_ril/blob/master/reference-ril/reference-ril.c#L118)