Optimize login input for keyboard avoiding

[yosr-fourati]

Replace the View with KeyboardAvoidingView:

return (
  <SafeAreaView style={{ backgroundColor: COLORS.white, flex: 1 }}>
    <KeyboardAvoidingView
      behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
      style={{ flex: 1 }}
      contentContainerStyle={{ flexGrow: 1 }}
    >
      <ScrollView
        contentContainerStyle={{ paddingTop: 50, paddingHorizontal: 20 }}
      >
        {/* ... */}
      </ScrollView>
    </KeyboardAvoidingView>
  </SafeAreaView>
);