[fenix] For https://github.com/mozilla-mobile/fenix/issues/10083: Do not cut off thumb when it is in pressed state

app/src/main/res/layout/layout_percentage_seek_bar.xml

@@ -8,6 +8,8 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:baselineAligned="false"
+    android:clipChildren="false"
+    android:clipToPadding="false"
     android:paddingStart="@dimen/radio_button_preference_horizontal"
     android:paddingTop="@dimen/preference_seek_bar_padding"
     android:paddingEnd="@dimen/radio_button_preference_horizontal"
@@ -52,12 +54,12 @@
         android:gravity="end|center_vertical"
         android:paddingStart="16dp"
         android:paddingEnd="0dp"
-        tools:text="200%"
         android:textColor="?attr/primaryText"
         android:textSize="16sp"
         app:layout_constraintBottom_toTopOf="@+id/sampleText"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toBottomOf="@android:id/summary" />
+        app:layout_constraintTop_toBottomOf="@android:id/summary"
+        tools:text="200%" />
 
     <View
         android:layout_width="0dp"