DefaultOggSeeker: use skipFully() instead skip().

skip() may skip less than what we want here.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=124930478

library/src/main/java/com/google/android/exoplayer/extractor/ogg/DefaultOggSeeker.java

@@ -174,7 +174,7 @@ import java.io.IOException;
         start = input.getPosition() + pageSize;
         startGranule = pageHeader.granulePosition;
         if (end - start + pageSize < MATCH_BYTE_RANGE) {
-          input.skip(pageSize);
+          input.skipFully(pageSize);
           return -(startGranule + 2);
         }
       }
@@ -194,7 +194,7 @@ import java.io.IOException;
     }
 
     // position accepted (before target granule and within MATCH_RANGE)
-    input.skip(pageSize);
+    input.skipFully(pageSize);
     return -(pageHeader.granulePosition + 2);
   }