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/com/modals/AltImageRead.tsx

@@ -30,7 +30,12 @@ export function Component({altText}: Props) {
       <View style={[styles.text, pal.viewLight]}>
         <Text style={pal.text}>{altText}</Text>
       </View>
-      <TouchableOpacity testID="altTextImageSaveBtn" onPress={onPress}>
+      <TouchableOpacity
+        testID="altTextImageSaveBtn"
+        onPress={onPress}
+        accessibilityRole="button"
+        accessibilityLabel="Save"
+        accessibilityHint="Save alt text">
         <LinearGradient
           colors={[gradients.blueLight.start, gradients.blueLight.end]}
           start={{x: 0, y: 0}}