Added sahlnaskh arabic font to Android.mk & fonts.mk files to actually get the font installed

Change-Id: If99e370f9d37ce1838bdcf10e895a9d0908d9176
core: fix volume panel more button transparency

Change-Id: I9f728256efbaf138611822079ea7737cd345bb19
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>