libqdutils: add edid raw data reading support

Add api getEdidRawData to fill the input buffer with
edid raw data(640 bytes). Add api to get connector type

Change-Id: I556bbea918693b4ced3492a639a38941a211702f
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
Merge "libqdutils: add edid raw data reading support"