Initialize mWcdmaRscpAsu and fix invalid value for asu

Initialize mWcdmaRscpAsu in the constructor.
Update an invalid value of asu from -1 to 255.

Test: auto - Passed SignalStrengthTest
Bug: 71329173
Change-Id: Ic6c03fa3c405377b23159038a1e23a45ba87239c
1 file changed