Improve standalone bcc for on-device compilation.

Bug: 7342767

This adds functionality for driver-writers to dynamically load plugins.
If such a plugin is loaded, we then execute any function called
rsCompilerDriverInit() from it. This function can initialize any other
state the driver-writer wants.

Change-Id: I733a6a3fc59c429a542cfcaf59a57ad231a19d01
3 files changed