For #1286 - Dynamically set fontsizefactor and reload current session

app/src/main/java/org/mozilla/fenix/settings/AccessibilityFragment.kt

@@ -9,6 +9,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import org.mozilla.fenix.R
+import org.mozilla.fenix.ext.requireComponents
 import org.mozilla.fenix.utils.Settings
 
 class AccessibilityFragment : PreferenceFragmentCompat() {
@@ -24,6 +25,9 @@ class AccessibilityFragment : PreferenceFragmentCompat() {
                     // Value is mapped from 0->30 in steps of 1 so let's convert to float in range 0.5->2.0
                     val newTextScale = ((newValue as Int * STEP_SIZE) + MIN_SCALE_VALUE).toFloat() / PERCENT_TO_DECIMAL
                     Settings.getInstance(context!!).setFontSizeFactor(newTextScale)
+                    requireComponents.core.engine.settings.automaticFontSizeAdjustment = (newTextScale == 1f)
+                    requireComponents.core.engine.settings.fontSizeFactor = newTextScale
+                    requireComponents.useCases.sessionUseCases.reload.invoke()
                 }
                 true
             }