React Native accessibility (#539)

* React Native accessibility

* First round of changes

* Latest update

* Checkpoint

* Wrap up

* Lint

* Remove unhelpful image hints

* Fix navigation

* Fix rebase and lint

* Mitigate an known issue with the password entry in login

* Fix composer dismiss

* Remove focus on input elements for web

* Remove i and npm

* pls work

* Remove stray declaration

* Regenerate yarn.lock

---------

Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/view/screens/Home.tsx

@@ -226,6 +226,9 @@ const FeedPage = observer(
           testID="composeFAB"
           onPress={onPressCompose}
           icon={<ComposeIcon2 strokeWidth={1.5} size={29} style={s.white} />}
+          accessibilityRole="button"
+          accessibilityLabel="Compose"
+          accessibilityHint="Opens post composer"
         />
       </View>
     )