Remove uids with empty history from NetworkStats uid enumeration
Remove uids with empty history from NetworkStats uid enumeration

Bug: 23018174
Change-Id: I1a482280599e0f5da18a208e727653d4bd4107ec

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