b0efeaf855
Currently the NetworkStatsManager APIs allow applications to query for their own data usage by UID and tag, but do not allow applications to query by foreground/background state. This is causing popular apps to resort to parsing xt_qtaguid stats files directly. Because this is no longer allowed for apps targeting P and above, provide replacement functionality. This API allows apps to query for data usage for a given state, but not to receive data usage broken down by state. This is consistent with how the current UID and tag APIs work. It is also not an undue burden on apps: there are currently only two states of interest (FOREGROUND and everything else), and even if we add states in the future, unmodified apps can still obtain total traffic using STATE_ALL. Bug: 72977484 Test: New CTS test added in other change in this topic. Change-Id: Ic8c9194569ffd599b49e4a8197c5c2ea0ec3f7f7