Add toggle button behavior, individual profile notifications, per-profile layouts, and transition delays

Changelog

Adds an optional controller setting for changing button behavior.
- Adds optional toggle behavior for controller buttons.
- Moves control definitions, including serialization/deserialization, into a dedicated SwControl class.
Adds individual notifications for each controller profile
- Stores softwing notifications under a common group
Makes controller opening more robust.
- Replaces 2s delay with logic for reopening the IME if it is closed within the first 2 seconds of activity.
- Replaces SurfaceViews with FrameLayouts, and adds surface views dynamically.
- Replaces custom class variables with Android defined class variables.
Ties controller layout to the selected profile
Creates a central "input_base" layout, which contains all of the other layouts.
Adds a line above the "profile" setting to visibly separate global from profile settings.
Fixes keyboard swivel behavior.
- Moves keyboard swapping logic into HandleShowIme.
Replaces lg keyboard search with a constant id definition.
Re-adds the transition delay setting.
Update help test to reflect the write_secure_settings requirement.