Cw 355 more talkback unlabeled (#913)

* feat(Talkback): make add contact button labeled

* feat(Talkback): add labeled semantics to cakepay buttons

- Use BasePage's default labeled back button instead of override
- Add filter button semantics
- Add ExcludeSemantics to search icon because it was messing with the whole search input box semantics and making it sound like an unlabeled button
- Add profile button label

* feat(Talkback): add labeled semantics to send page buttons

- Add semantics label to Paste button
- Add semantics label to Scan button
- Add semantics label to Address Book button

* fix: use i18n strings instead of hardcoded semantics labels and add missing 'profile' string

* fix: also add localization to back button on base page

* fix(Talkback): add the rest of localized strings & add missing close string

* fix: pt strings

* feat: add correct strings using translate script

* Update strings_yo.arb [skip ci]

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

lib/src/screens/pin_code/pin_code_widget.dart

@@ -226,7 +226,7 @@ class PinCodeState<T extends PinCodeWidget> extends State<T> {
                                     child: Container(
                                       margin: EdgeInsets.only(left: marginLeft, right: marginRight),
                                       child: Semantics(
-                                        label: 'Delete',
+                                        label: S.of(context).delete,
                                         button: true,
                                         onTap: () => _pop(),
                                         child: TextButton(