Two small user-visible fixes:

- TUI Memory/Network panels: add one-char inter-column padding so wide
  values stop butting up against the label ("Total PSS442.8 MB" →
  "Total PSS 442.8 MB").
- Network collector: force `dumpsys netstats --poll` before reading the
  detail dump on the Android-10+ fallback path. Observed on Pixel 9 /
  Android 16, NetworkStatsService returns cached bucketed totals across
  successive ticks, so per-tick rx/tx deltas were always zero. `--poll`
  triggers a fresh flush and deltas now reflect real traffic.