Keyguard: Set untranslatable

Change-Id: I83fd46ec44b65523e7f6f838ef93320d83bfe50f
fonts: Add LBhashitaComplexSans font for Sinhala

* From http://www.siyabas.lk/files/Bhashitha_Linux.zip

Change-Id: I293bfe84efd663d5a105541196e2bb3b123ee192