Fix issue where test result is not spoken when refresh button is hit (EXPOSUREAPP-1540) (#827)

* Update TracingViewModel.kt

* Update TracingViewModel.kt

* Added the word 'Button' to various contentDescriptions via formatters

Added the word 'Button' to various contentDescriptions via formatters specifically for  content without focusable subcontent that are explored by touch

* Update FormatterSettingsHelper.kt

* removed space in strings file and included in formatter instead

* Added formatter tests

* Accessibility changes on test result screen - view should be described when refreshed

-Trigger accesibility announcement when refresh is clicked.
-Set live region to assertive so that any view changes are announced as soon as they are made.

* Update fragment_submission_test_result.xml

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: Philipp Woessner <64482866+pwoessner@users.noreply.github.com>

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/ui/submission/SubmissionTestResultFragment.kt

@@ -127,6 +127,7 @@ class SubmissionTestResultFragment : Fragment() {
     private fun setButtonOnClickListener() {
         binding.submissionTestResultButtonPendingRefresh.setOnClickListener {
             submissionViewModel.refreshDeviceUIState()
+            binding.submissionTestResultContainer.sendAccessibilityEvent(AccessibilityEvent.TYPE_ANNOUNCEMENT)
         }
 
         binding.submissionTestResultButtonPendingRemoveTest.setOnClickListener {

Corona-Warn-App/src/main/res/layout/fragment_submission_test_result.xml

@@ -14,6 +14,7 @@
     <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/submission_test_result_container"
         android:contentDescription="@string/submission_test_result_headline"
+        android:accessibilityLiveRegion="assertive"
         android:layout_width="match_parent"
         android:layout_height="match_parent">