libeffects: do not use GNU old-style field designators

Avoiding the use of GCC extensions improves code portability

Change-Id: I9edbedc5c8ad4aa46ca54bc2e28280441431a530
Long mp3 metadata displays as corrupted file after transfer

Cut the metadata to 1 Byte and return in function
getObjectPropertyList in order to show it properly on a PC.

Change-Id: Iefacf9fa86c20ece2572e6d95d35877a94066fe7
libnbaio: Fix previous get_presentation_position commit

The previous commit has no effect because HAVE_PRE_KITKAT_AUDIO_BLOB is
actually never defined.

Change-Id: Ic41b5f02c2cee741aaacce6da1839001a49b9410
Avoid jumps to faulty position after seeks

When seeking multiple times it is possible that some seeks
are discarded in AwesomePlayer, which causes unwanted jumps
to faulty positions.
The reason is that a seek flag is reset twice in AwesomePlayer.
At first when the video seek is completed and then again when the
audio seek is completed. If a new seek is made after the previous
video seek completed but before the previous audio seek completed,
the new seek position is discarded by the previous audio seek
completion.

This fix makes sure that the seek flag is reset only when video
has completed the seek.

Change-Id: I8f8741d4cb8682345f1d1855bbad57c05f4e3c8d