Export cc functions for snapshotting Rust rlibs.

Export additional fuctions, structs, and interfaces from cc for use in
the rust package to allow for rlib snapshotting.

Bug: 184042776
Test: m nothing
Change-Id: I4c53b9378d5d5b5973dbd23ab692cdfb2ede60b9
diff --git a/cc/image.go b/cc/image.go
index 9370c40..c9c0e63 100644
--- a/cc/image.go
+++ b/cc/image.go
@@ -365,8 +365,8 @@
 }
 
 func (m *Module) SnapshotVersion(mctx android.BaseModuleContext) string {
-	if snapshot, ok := m.linker.(snapshotInterface); ok {
-		return snapshot.version()
+	if snapshot, ok := m.linker.(SnapshotInterface); ok {
+		return snapshot.Version()
 	} else {
 		mctx.ModuleErrorf("version is unknown for snapshot prebuilt")
 		// Should we be panicking here instead?