Robert Greenwalt 60551b6837 Add a Carrier-config specific ratcheter of RATs.
Only reports transitions to higher RATs within a given family.
Reset when we move to a new cell.
Avoids costly propogation of RAT flapping within the family,
for example every outgoing data pops us into a higher RAT and
idle time pops us back down.

bug:27360321
Change-Id: I549d79c1c74325981bee284cef452bd096184d86
2016-06-22 11:27:42 -07:00
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