[3/3] services/Telephony: Add Network Tiles

      Add an LTE tile and a 2G/3G mobile network tile.

      The LTE tile requires that at least one (1) of the following configs
      be present in the device's build.prop in order to show:
          telephony.lteOnCdmaDevice=1
          telephony.lteOnGsmDevice=1

      The 2G/3G tile toggles between 3G Only, 2G Only and 2G/3G.

      If LTE is turned on the 2G/3G tile is disabled (shows unknown).
      The reverse is also true, turning on the 2G/3G tile disables LTE tile.

Linked commits:
      frameworks/base
      frameworks/opt/telephony

Change-Id: I6e801bda2ab447ab6cf8418220d6854e257f7d9e
[2/2] services/Telephony: Combine LTE & 2G/3G Tiles

This combines both network tiles into one tile.
2G -> 3G -> 2G3G -> LTE

Linked commit: frameworks/base

Change-Id: Ib8c463e9bd9b9d70462e3a7544c54d239a1c3254