chore: add zh-TW to locale-config (#155)

Reviewed-on: https://gitea.angry.im/PeterCxy/OpenEUICC/pulls/155
Co-authored-by: septs <github@septs.pw>
Co-committed-by: septs <github@septs.pw>

app-common/src/main/res/xml/locale_config.xml

@@ -3,4 +3,5 @@
     <locale android:name="en-US" />
     <locale android:name="ja" />
     <locale android:name="zh-CN" />
+    <locale android:name="zh-TW" />
 </locale-config>