Revert "Revert "Move MediaBufferXXX from foundation to libmediaextractor""

This reverts commit 95a8bfab98a73a75eb60ecf2cc8683f4a1f04b35.
Plus, keeps 'virtual' keyword for ~MediaBuffer which has a child class.

Test: cts-tradefed run cts-dev --module CtsMediaTestCases --compatibility:module-arg
CtsMediaTestCases:include-annotation:android.platform.test.annotations.RequiresDevice
Bug: 67908542
Change-Id: Ib94d574d6bbd6245c174dd1c9bcca379015724cc
diff --git a/media/libmediaplayerservice/nuplayer/GenericSource.cpp b/media/libmediaplayerservice/nuplayer/GenericSource.cpp
index 33c3094..511f46f 100644
--- a/media/libmediaplayerservice/nuplayer/GenericSource.cpp
+++ b/media/libmediaplayerservice/nuplayer/GenericSource.cpp
@@ -24,6 +24,7 @@
 #include <binder/IServiceManager.h>
 #include <cutils/properties.h>
 #include <media/DataSource.h>
+#include <media/MediaBufferHolder.h>
 #include <media/MediaExtractor.h>
 #include <media/MediaSource.h>
 #include <media/IMediaHTTPService.h>
@@ -1160,14 +1161,12 @@
 
         // data is already provided in the buffer
         ab = new ABuffer(NULL, mb->range_length());
-        mb->add_ref();
-        ab->setMediaBufferBase(mb);
+        ab->meta()->setObject("mediaBufferHolder", new MediaBufferHolder(mb));
 
         // Modular DRM: Required b/c of the above add_ref.
         // If ref>0, there must be an observer, or it'll crash at release().
         // TODO: MediaBuffer might need to be revised to ease such need.
         mb->setObserver(this);
-        // setMediaBufferBase() interestingly doesn't increment the ref count on its own.
         // Extra increment (since we want to keep mb alive and attached to ab beyond this function
         // call. This is to counter the effect of mb->release() towards the end.
         mb->add_ref();