fix(l10n): Update Lithuanian translations

Currently translated at 60.7% (17 of 28 strings)

Translation: Pachli/Core/Preferences : Main
Translate-URL: https://hosted.weblate.org/projects/pachli/corepreferences-main/lt/

core/preferences/src/main/res/values-lt/strings.xml

@@ -15,4 +15,6 @@
     <string name="app_theme_auto">Automatinis saulėlydžio metu</string>
     <string name="download_location_per_sender">Kiekvieno siuntėjo aplankai, atsisiuntimų aplanke</string>
     <string name="app_theme_system">Naudoti sistemos dizainą</string>
+    <string name="pref_tab_contents_icon_only">Tik piktograma</string>
+    <string name="pref_tab_contents_text_only">Tik tekstas</string>
 </resources>