Other improvements:
- remove "Start dreaming now", promote "When to dream" to action bar
- added logging
- hide dream settings button if n/a
- new flat style for settings/preview + dividers
- refresh dreams list when packages are installed/uninstalled
- added placeholder for help url
Bug:7010260
Change-Id: Ia443b4f76678eaf1a52b907d50aefb0d8f7e4748