store: add libv4l2_codec2_store library.

This CL adds the libv4l2_codec2_store library, that is used to create
the C2Components implemented in libv4l2_codec2_components

Bug: 152714603
Test: mmm external/v4l2_codec2

Change-Id: If2e978627088ec63746e08a96a90278ebbd73bb2
3 files changed