[R44c] Extension System Data size handling in ASF Parser.

BZ: 191925

Initialization of mPlayreadyHeader. Fixes BZ 191925
Handling of ExtensionSystemDataSize when value is 0xFFFF.
Explicit usage of SampleIDLength instead of assuming it ia always 8.

Change-Id: I57878da4f5364af708bf8055fcc80dfabb6365e3
Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
4 files changed