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