Bugfix: Filter keys with ':' when constructing metadata from io.grpc metadata. (#126)

* Support export/local and default_symbol_visibility.

* Support (pb.java).nest_in_file_class

* Add option target validation tests. Closes #111

* Add (unsupported) handling for option and public import.

* Only write top level enums for common source set.

* add support for closed enums.

* Set packed option unavailable on proto editions.

* Fix enum scoping.

* Breaking: Proto enums are now generated as sealed interfaces. Removed Proto One Of unknown option.

* Add proto2 parsing

* Add proto2 grammar

* Add support for group serialization

* Use kotlin IllegalArgumentException.

* Add descriptor.proto to well known types.

* Add proto options import support.

* Support default option on enums.

* Add symlink

* Add required field parsing support.

* Revert source command.

* Fix some tests.

* Fix group message reading.

* Update readme.

* Filter keys with ':' when constructing metadata from io.grpc metadata.

Author: TimOrtel

kmp-grpc-core/src/androidJvmCommon/kotlin/io/github/timortel/kmpgrpc/core/conversionutil.kt

@@ -31,6 +31,9 @@ internal val Metadata.jvmMetadata: JvmMetadata
 internal val JvmMetadata.kmMetadata: Metadata
     get() {
         val entries: List<Entry<*>> = keys().mapNotNull { keyName ->
+            // https://github.com/grpc/grpc-java/issues/11873#issuecomment-2639132154
+            if (keyName.startsWith(':')) return@mapNotNull null
+
             if (keyName.endsWith(BINARY_KEY_SUFFIX)) {
                 val key = io.grpc.Metadata.Key.of(keyName, JvmMetadata.BINARY_BYTE_MARSHALLER)