input/Plugin: pass URI as std::string_view

test/DumpDecoderClient.cxx

@@ -54,7 +54,7 @@ DumpDecoderClient::SeekError() noexcept
 }
 
 InputStreamPtr
-DumpDecoderClient::OpenUri(const char *uri)
+DumpDecoderClient::OpenUri(std::string_view uri)
 {
 	return InputStream::OpenReady(uri, mutex);
 }

test/DumpDecoderClient.hxx

@@ -31,7 +31,7 @@ public:
 	SongTime GetSeekTime() noexcept override;
 	uint64_t GetSeekFrame() noexcept override;
 	void SeekError() noexcept override;
-	InputStreamPtr OpenUri(const char *uri) override;
+	InputStreamPtr OpenUri(std::string_view uri) override;
 	size_t Read(InputStream &is,
 		    std::span<std::byte> dest) noexcept override;
 	void SubmitTimestamp(FloatDuration t) noexcept override;

test/RunChromaprint.cxx

@@ -90,7 +90,7 @@ public:
 
 class MyChromaprintDecoderClient final : public ChromaprintDecoderClient {
 public:
-	InputStreamPtr OpenUri(const char *) override {
+	InputStreamPtr OpenUri(std::string_view) override {
 		throw std::runtime_error("Not implemented");
 	}
 };