DO NOT MERGE - Consider I-Frame at zeroeth position when searching for sync frames

The current logic does not check the I-frame at zeroeth position and therefore
for the files with only 1 I-Frame at zeroeth postion does not play.

Originally authored by Braganza Sam Robertsh <sam.braganza@samsung.com>

Do not merge to master branch since we made some improvement to SampleTable.cpp in the master branch.

Change-Id: I068184dec71986f14a586f769c2af1f52b4bcf94
related-to-bug: 5711942