Hide "Data usage" item when kernel support isn't available and
enabled. Change "restrict background" strings to reflect metered
status. Hide app settings button when no package found. Always
start limit sweep above any warning. Imply metered state for
networks with limits.
Bug: 6303364, 5465643, 5379686, 6376276, 6368329, 6376276
Change-Id: I4faccc9a50f2f741fd937bb8c361a3ca055135e2
Add UI to change metered flag on NetworkPolicy, and support Wi-Fi
policies per-SSID. Create Wi-Fi policies as needed, but leave cycle
undefined.
Only show and mutate mobile policies when SIM state is ready.
Bug: 3001465, 3291052
Change-Id: I481a202fe0e68fc2f5adfd3b3a6f40347d2b168c