Don't strip already stripped VNDK 28 libprotobuf-cpp-*.so

* This just causes some build noise

Change-Id: I6dd705c20deb115bd3be4208fb754e6def71961b
diff --git a/Android.bp b/Android.bp
index 852301d..e2857ad 100644
--- a/Android.bp
+++ b/Android.bp
@@ -51,6 +51,10 @@
     name: "libprotobuf-cpp-lite-vendorcompat",
     stem: "libprotobuf-cpp-lite",
     vendor: true,
+    // These are already stripped, and restripping them just issues diagnostics.
+    strip: {
+        none: true,
+    },
     target: {
         android_arm64: {
             srcs: ["arm64/arch-arm64-armv8-a/shared/vndk-core/libprotobuf-cpp-lite.so"],
@@ -80,6 +84,10 @@
     name: "libprotobuf-cpp-full-vendorcompat",
     stem: "libprotobuf-cpp-full",
     vendor: true,
+    // These are already stripped, and restripping them just issues diagnostics.
+    strip: {
+        none: true,
+    },
     target: {
         android_arm64: {
             srcs: ["arm64/arch-arm64-armv8-a/shared/vndk-core/libprotobuf-cpp-full.so"],