fix ratratchet when CID change right before RAT change.

There is a timing gap of updating CID and DataRAT when moving between
cell from different RAT (e.g., move from EDGE to GPRS). In that case,
cell ID remains the same when handling rat change, thus ratratchet
will not report lower rate RAT for the purpose of battery-saving.

As its hard to gurantee synchronous cell location change and RAT change,
Frameworks will bypass ratratchet on the next RAT change event
following CID change. This will fix the timeline issue but with some
degree of performance regression when cell location change is not
followed with an immediate RAT change. In that case, we still report
lower rate RAT (only for the next RAT change) and update UI etc.

Bug: 65695609
Test: ServiceStateTrackerTest.java
(cherry picked from commit 277c6456)

Change-Id: Id7954fe5163cdf587eea39227b6f35d325e7a877
(cherry picked from commit f1f44401634c73cca9633ee7012abf734cd9927e)