Upgrade to golang protobuf api v2

Major operations:
 * Fix the go_package entries to be consistent, as the new tool
   complains when it doesn't have a '/'.
 * Regenerate with the new protoc-gen-go tool.
 * github.com/golang/protobuf -> google.golang.org/protobuf
 * proto.[Un]MarshalText -> prototext.[Un]Marshal

Change-Id: Ie1147bd2457fafb66ba555461b3bf14f0561a25d
diff --git a/cmd/sbox/Android.bp b/cmd/sbox/Android.bp
index b8d75ed..454cfd8 100644
--- a/cmd/sbox/Android.bp
+++ b/cmd/sbox/Android.bp
@@ -19,6 +19,7 @@
 blueprint_go_binary {
     name: "sbox",
     deps: [
+        "golang-protobuf-encoding-prototext",
         "sbox_proto",
         "soong-makedeps",
         "soong-response",
@@ -31,7 +32,10 @@
 bootstrap_go_package {
     name: "sbox_proto",
     pkgPath: "android/soong/cmd/sbox/sbox_proto",
-    deps: ["golang-protobuf-proto"],
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
     srcs: [
         "sbox_proto/sbox.pb.go",
     ],