Fix memory leak in OggExtractor

Test: added a temporal log and run poc
Bug: 63581671
Change-Id: I436a08e54d5e831f9fbdb33c26d15397ce1fbeba
(cherry picked from commit 63079e7c8e12cda4eb124fbe565213d30b9ea34c)
diff --git a/media/libstagefright/OggExtractor.cpp b/media/libstagefright/OggExtractor.cpp
index f953874..e058462 100644
--- a/media/libstagefright/OggExtractor.cpp
+++ b/media/libstagefright/OggExtractor.cpp
@@ -575,6 +575,10 @@
             }
             // First two pages are header pages.
             if (err == ERROR_END_OF_STREAM || mCurrentPage.mPageNo > 2) {
+                if (mBuf != NULL) {
+                    mBuf->release();
+                    mBuf = NULL;
+                }
                 break;
             }
             curGranulePosition = mCurrentPage.mGranulePosition;