Per-service preferences

[ZacSweers]

I think this could be done in a tasteful manner that gets some customization without getting too complicated.

Couple ideas:

• ServiceMeta could include an R.xml reference to a preferences file that could be displayed for that service. Gives them full power with basic preferences while making the scope pretty small and keeps catchup-main from needing to know anything specific about it.
• Alternatively - could start their own (possibly unique) preferences activity/controller for full control? This would be extreme, but then services could even manage their own auth or more fine grained controls (think "list of subreddits" for reddit)
  • I'm still pretty against having auth support right now, but if it were implemented, it would probably be via something like this.

Other notes

• servicemeta would need to be extracted to something that's at app-scope to be shared across activities, unless the About and Settings activities were pushed down into their own Controllers. I think app scope is fine though as they're pretty lightweight.

[ZacSweers]

Some ideas of service prefs:

Reddit:

• Custom subreddits
• Auth?!?

GitHub:

• Specify your own query
• Language filter