Fix 'potential memory leak' compiler warning.

This CL fixes the following compiler warning:

frameworks/av/media/libstagefright/SampleTable.cpp:569:9: warning:
 Memory allocated by 'new[]' should be deallocated by 'delete[]', not
 'delete'.

Bug: 33137046
Test: Compiled with change; no warning generated.

Change-Id: I29abd90e02bf482fa840d1f7206ebbdacf7dfa37
(cherry picked from commit 158c197b668ad684f92829db6a31bee3aec794ba)
(cherry picked from commit 37c428cd521351837fccb6864f509f996820b234)
diff --git a/media/libstagefright/SampleTable.cpp b/media/libstagefright/SampleTable.cpp
index ee5fdf0..70d6cb7 100644
--- a/media/libstagefright/SampleTable.cpp
+++ b/media/libstagefright/SampleTable.cpp
@@ -561,7 +561,7 @@
 
     if (mDataSource->readAt(data_offset + 8, mSyncSamples,
             (size_t)allocSize) != (ssize_t)allocSize) {
-        delete mSyncSamples;
+        delete[] mSyncSamples;
         mSyncSamples = NULL;
         return ERROR_IO;
     }
@@ -987,4 +987,3 @@
 }
 
 }  // namespace android
-