bootanimtion: fix no boot sound due to error file descriptor

-wrong file descriptor passed to setDataSource(fd, offset, length)
 API and causes no sound
-use the default setDataSource(httpService,url,header) to parse
 the file of boot sound

CRs-Fixed: 731547

Change-Id: I437e7d797cd13b7f8f8e0fbf81d5de99c55c27d1