Support shared_libs, static_libs and default_shared_libs in cc_object

cc_object files don't link against static or shared libraries, but they
can use headers from them.  Make cc_object use the default_shared_libs
headers, and add support for explicit static and shared library
dependencies.

Bug: 153662223
Test: go test ./cc/...
Change-Id: I9ab160ede06db1b135d217d72770c22f500cfe1b