media_codecs: Use FFMPEG for WMA playback

QCOM hardware WMA decoder is broken

Change-Id: Ia660dba5881143310e94fc4eb92fd6cd92443ded
init: Clear splash screen a bit later

Showing a blank screen for a long time confuses the users

Change-Id: I95912f7948329d4b2271555a1f0ccef8863e531c
init: Require root for dmesg access

Fixes CTS failure & potential security issues

Change-Id: I8c50265a853da3a2edcf434233d890f71ba8589b