Update Adaptive connectivity page.

- Use MainSwitchPreference.
- Use the TopIntroPreference to display the summary.
- Use the IllustrationPreference to display the stastic
  illustration.
- Add new illustrations for adaptive connectivity.

Fix: 178673083
Test: robotest and test the switch preference manually
Change-Id: I2376f4433b61ce1d3da287de92660fbeea5dd64e
4 files changed