Parameterize cc_stub_suite for api surface

cc_stub_suite now has an additional attribute correponding to the api
surface. This attribute will be used to pass additional args to the stub
generator.

Update bp2build to set the api_surface of the apex stubs. This ensures
that its stubs are generated with "--systemapi --apex"

Test: unit tests
Bug: 298085502
Change-Id: If4c479f85e6e485b5c795a565a0c559f1f013bf5
diff --git a/bp2build/apex_conversion_test.go b/bp2build/apex_conversion_test.go
index 5aed4ad..d6db677 100644
--- a/bp2build/apex_conversion_test.go
+++ b/bp2build/apex_conversion_test.go
@@ -1315,6 +1315,7 @@
 				"tags":              `["apex_available=myapex"]`,
 			}),
 			MakeBazelTarget("cc_stub_suite", "foo_stub_libs", AttrNameToString{
+				"api_surface":          `"module-libapi"`,
 				"soname":               `"foo.so"`,
 				"source_library_label": `"//:foo"`,
 				"symbol_file":          `"foo.map.txt"`,