Android: Replace spinners with dropdown menus

[t895]

I finally got around to adapting the "spinners"/dropdown menus to material components. Here's the new looks in the Convert and Riivolution activities.

Riivolution

Old

New

Convert

Old

New

[MayImilae]

This is better. Design LGTM.

[cobalt2727]

Wouldn't it make more sense to have boolean settings a checkbox instead of Enabled/Disabled? Less button presses to get things done.

[t895]

Wouldn't it make more sense to have boolean settings a checkbox instead of Enabled/Disabled? Less button presses to get things done.

I would agree with you but there are settings that have more than just Enabled/Disabled

[mbc07]

I always thought that was weird. Definitely not a blocker for this PR but it would be nice if the settings where enabled/disabled are the only states could be replaced with checkboxes (even better if they could be replaced with on/off toggles -- I think they're called radio switches, not sure)...

[t895]

I always thought that was weird. Definitely not a blocker for this PR but it would be nice if the settings where enabled/disabled are the only states could be replaced with checkboxes (even better if they could be replaced with on/off toggles -- I think they're called radio switches, not sure)...

Yeah they're switches. I would love to remove check boxes at some point in favor of switches but I'm currently waiting on an issue with the Android Gradle Plugin to be resolved.