[RichText]: when editable is focused, tapping on toolbar actions switches focus

[mzorz]

When a RichText component has the caret blinking and its block is selected, tapping on its toolbar actions do not work as expected - instead focus changes to next focusable item available.

To test:

1. launch the demo app from scratch
2. Tap on a RichText block: "Welcome to Gutenberg" (particularly, tap somewhere within the "Gutenberg" word, to leave space to avoid collision with up/down arrows next steps)
3. observe the caret appears, the block gets selected, the keyboard appears and the editor toolbar reflects the Heading style
4. try tapping on the DOWN arrow.
5. observe the next block ("Hello World") gets the focus and is selected.

If you continue, the next available focusable items will get focused, for example:

6. from the previous state left in step 5, try tapping on the DOWN arrow on this new block (Hello World).
7. observe the next RichText block now gets the focus (jumping from Page Break block, to Lorem ipsum block).

What should happen?

1. when a block gets selected, its inline toolbar actions should be actionable.
2. if the block is editable, it should also show the keyboard and allow editing / moving caret / copy/paste, etc.

Where

Observed on a real device (Google Pixel 8.1)

[mzorz]

Closing, as this is not reproduceable anymore once wordpress-mobile/react-native-aztec#84 and this #296 get merged