tree 2de9eff8a305e06474b0e9b39f847a3059583764
parent 640058c9e9dd4d26f7044a756906ca04db7398f7
author Jack Yu <jackyu@google.com> 1466627267 -0700
committer Jack Yu <jackyu@google.com> 1467159227 -0700

Added a new API to query VT data usage

Added a new API for NetworkStatsService to query aggregated VT
data usage from all subscription since boot up.

bug: 20888836
Change-Id: I6cc9344d6f1c25c90ea41be44c1afe529adc5a73