Multi-Project Commit: Move of filterfw out of system/media (2 of 7)

This is part of the multi-project commit to move the filter-framework
from system/media/mca to frameworks/base/media/mca.

Note that the filter-framework will soon be replaced with a refactored
version currently under API review (also to go under frameworks/base).
This move is done now to unblock the PDK efforts.

Change-Id: I9f42be5a12a9e8157512be11f04e38e4548970be