Dual controller typing

[keianhzo]

Closes #2645 Adds support for dual controller typing.

Android doesn't support multiple device input in a clean way. The viewgroup clears the hovers from the other hovered items when a new child is hovered which causes a hover fight when more than one device is hovering elements from the same layout. When the view drawing is handled this is easier to workaround but in our case that would mean to rewrite quite a lot of code at this point.

This implementation add support for dual hovering for the keyboard views (characters, symbols and numbers) and for the rest of the views in the keyboard widget (domains, languages and autocompletion) the first device entering them has preference.

[MortimerGoro]

Looks pretty good! I found these issues:

• Clicking the two controllers at the same time closes the keyboard
• Place the two controllers on a consecutive letters (e.g. d and f). Clicking on the one key flickers the hover effect in the other key
• Long press a letter to show the extra letters menu: you can't use the other controller to select a letter from that menu

[keianhzo]

@MortimerGoro fixed. Regarding:

Long press a letter to show the extra letters menu: you can't use the other controller to select a letter from that menu

Android doesn't support multiple device input in a clean way. The viewgroup clears the hovers from the other hovered items when a new child is hovered which causes a hover fight when more than one device is hovering elements from the same layout. When the view drawing is handled this is easier to workaround but in our case that would mean to rewrite quite a lot of code at this point.

I've handled this just letting one device inside a view at a time, first entering gets the focus.

[Softvision-RemusDranca]

We tested and logged multiple issue regarding this feature. We also finished creating the test cases for it. Considering this I will remove the QA label.