WIP: Better onboarding

[smichel17]

When complete, this PR will close #114. Steps:

• [x] Remove all permission explanation dialogs
• [x] Allow enabling settings or even the filter when the relevant permissions are not granted
• [x] If relevant permissions are not granted, show a snackbar at the bottom, "Some features require additional permissions." It should have a single action, "Show". It will appear when:
  • [x] Overlay permission is not granted
  • [x] Any currently enabled feature requires additional permissions to work (app monitoring, sunrise-sunset schedule.
• [ ] "show" action opens a permission grant popup like acdisplay
• [ ] Enable app monitoring and sunrise-sunset schedule by default
• [ ] Squash commits

[smichel17]

Weird that the build is failing on travis. It works locally..

Lol, apparently git commit -a is not the same as git add --all && git commit

[smichel17]

ugh, dealing with android ui is such a pain :S

[smichel17]

Closing for now, plan to re-open after a UI refresh that moves non-filter settings into a proper settings screen.