Make Codec2 software service public

This CL makes the software Codec2 service present the public Codec2 HAL
interface, and makes the framework use it.

Test: make cts -j123 && cts-tradefed run cts-dev -m \
CtsMediaTestCases --compatibility:module-arg \
CtsMediaTestCases:include-annotation:\
android.platform.test.annotations.RequiresDevice

Bug: 112362730
Bug: 119853704

Change-Id: I047c6948a883a6e085d988a3fa542129ebb9571f