Test report for the time spent in each signal strength bin, along
with the number of times that bin was entered showed the result
as Bin=3 Time=3211926000 Count=0. With a non-zero Time, the Count
value 0 was wrong.
The cause of the problem was that getPhoneSignalStrengthCount() used
mPhoneDataConnectionsTimer, instead of mPhoneSignalStrengthsTimer,
to get the count.
Change-Id: I55ac1125abfcfdc105605d76d1c706ac315b90cc
fb90081351