Add required --add-opens server JVM args also with non-embedded JDK

Since the Bazel server requires JDK 11 or higher to run, the
`--add-opens` server JVM args can now be added unconditionally.

src/main/cpp/blaze.cc

@@ -359,13 +359,12 @@ static vector<string> GetServerExeArgs(const blaze_util::Path &jvm_path,
   startup_options.AddJVMArgumentPrefix(jvm_path.GetParent().GetParent(),
                                        &result);
 
-  // TODO(b/109998449): only assume JDK >= 9 for embedded JDKs
-  if (!startup_options.GetEmbeddedJavabase().IsEmpty()) {
-    // quiet warnings from com.google.protobuf.UnsafeUtil,
-    // see: https://github.com/google/protobuf/issues/3781
-    result.push_back("--add-opens=java.base/java.nio=ALL-UNNAMED");
-    result.push_back("--add-opens=java.base/java.lang=ALL-UNNAMED");
-  }
+  // quiet warnings from com.google.protobuf.UnsafeUtil,
+  // see: https://github.com/google/protobuf/issues/3781
+  // The Bazel server requires Java 11, so these options are known to be
+  // supported.
+  result.push_back("--add-opens=java.base/java.nio=ALL-UNNAMED");
+  result.push_back("--add-opens=java.base/java.lang=ALL-UNNAMED");
 
   result.push_back("-Xverify:none");