fonts: Add LBhashitaComplexSans font for Sinhala

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

Change-Id: I293bfe84efd663d5a105541196e2bb3b123ee192
Make the default value of in-call noise suppression configurable.

Change-Id: I1dc0b6085807c49370a06243689b70ea4b91732b