Track scan count by UID
Track scan count by UID

Helps track down misbehaving apps that are initiating
too many scans

Bug:5722180
Change-Id: I0bc396cf5e68ed53b900e8a65abb56acdbd8d8a5

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base