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/ui/metrics/Android.bp b/ui/metrics/Android.bp
index c428ec4..1590ab0 100644
--- a/ui/metrics/Android.bp
+++ b/ui/metrics/Android.bp
@@ -37,7 +37,10 @@
 bootstrap_go_package {
     name: "soong-ui-metrics_proto",
     pkgPath: "android/soong/ui/metrics/metrics_proto",
-    deps: ["golang-protobuf-proto"],
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
     srcs: [
         "metrics_proto/metrics.pb.go",
     ],
@@ -46,7 +49,10 @@
 bootstrap_go_package {
     name: "soong-ui-metrics_upload_proto",
     pkgPath: "android/soong/ui/metrics/upload_proto",
-    deps: ["golang-protobuf-proto"],
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
     srcs: [
         "upload_proto/upload.pb.go",
     ],