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

Author: James Dong

media/libstagefright/SampleTable.cpp

@@ -627,6 +627,14 @@ status_t SampleTable::findSyncSampleNear(
 
         ++left;
     }
+
+    if (left == mNumSyncSamples) {
+        if (flags == kFlagAfter) {
+            LOGE("tried to find a sync frame after the last one: %d", left);
+            return ERROR_OUT_OF_RANGE;
+        }
+    }
+
     if (left > 0) {
         --left;
     }