chore(l10n): update Latvian translations

Currently translated at 1.9% (18 of 916 strings)

Translation: Fossify/Commons
Translate-URL: https://hosted.weblate.org/projects/fossify/commons/lv/
Via: Weblate

Author: Edgars Andersons

commons/src/main/res/values-lv/strings.xml

@@ -36,4 +36,10 @@
         <item quantity="one">Izdzēš %d vienumu</item>
         <item quantity="other">Izdzēš %dvienumus</item>
     </plurals>
+    <plurals name="files_saved">
+        <item quantity="zero">Datnes sekmīgi saglabātas</item>
+        <item quantity="one">Datne sekmīgi saglabāta</item>
+        <item quantity="other">Datnes sekmīgi saglabātas</item>
+    </plurals>
+    <string name="invalid_file_format">Nederīgs datnes veidols</string>
 </resources>