[fenix] For https://github.com/mozilla-mobile/fenix/issues/20764 separate learn more string

app/src/main/java/org/mozilla/fenix/settings/studies/StudiesView.kt

@@ -80,8 +80,9 @@ class StudiesView(
     @VisibleForTesting
     internal fun bindDescription() {
         val sumoUrl = SupportUtils.getSumoURLForTopic(context, OPT_OUT_STUDIES)
-        val rawText =
-            context.getString(R.string.studies_description, sumoUrl)
+        val description = context.getString(R.string.studies_description)
+        val learnMore = context.getString(R.string.studies_learn_more)
+        val rawText = "$description <a href=\"$sumoUrl\">$learnMore</a>"
         val text = HtmlCompat.fromHtml(rawText, HtmlCompat.FROM_HTML_MODE_COMPACT)
 
         val spannableStringBuilder = SpannableStringBuilder(text)

app/src/main/res/values/strings.xml

@@ -619,8 +619,10 @@
     <string name="studies_remove">Remove</string>
     <!-- Title of the active section on the studies list -->
     <string name="studies_active">Active</string>
-    <!-- Description for studies, it indicates why Firefox use studies and links to an article for more information. The %1 will be replaced with the corresponding article URL -->
-    <string name="studies_description"><![CDATA[Firefox may install and run studies from time to time. <a href="%1$s">Learn more</a>]]></string>
+    <!-- Description for studies, it indicates why Firefox use studies -->
+    <string name="studies_description">Firefox may install and run studies from time to time.</string>
+    <!-- Learn more link for studies, links to an article for more information about studies. -->
+    <string name="studies_learn_more">Learn more</string>
 
     <!-- Sessions -->
     <!-- Title for the list of tabs -->