Partial revert "Move unused classes out of stagefright foundataion"

This imports the old foundation code in the standard platform stagefright.
The foundation variant is used in VNDK, we can't change the ABI there.

This reverts commit 5ec3d6ac.

Change-Id: Iebcf5d89a768fdb830bea90fbf2c2427a4c3d139
Signed-off-by: DennySPb <dennyspb@gmail.com>
Signed-off-by: Luca Stefani <luca.stefani.ge1@gmail.com>