Add IPTV default implementation

Frontend::tune(): create a streamer using plugin interface to
read a byte and return LOCKED event if byte is read

Demux::setFrontendDataSource():open a new stream to read data
from the socket and push the data read to DVR FMQ.

Test: atest VtsHalTvTunerTargetTest
Bug: 288170590
Change-Id: Iaf2eae7b4dc9e7d69b1f7b3a367d24f6acdd68be
diff --git a/tv/tuner/aidl/default/dtv_plugin.h b/tv/tuner/aidl/default/dtv_plugin.h
new file mode 100644
index 0000000..0ee5489
--- /dev/null
+++ b/tv/tuner/aidl/default/dtv_plugin.h
@@ -0,0 +1,31 @@
+#ifndef LIVE_DTV_PLUGIN_H_
+#define LIVE_DTV_PLUGIN_H_
+
+#include <fstream>
+#include "dtv_plugin_api.h"
+
+class DtvPlugin {
+  public:
+    DtvPlugin(const char* plugin_path);
+    ~DtvPlugin();
+
+    bool load();
+    int getStreamerCount();
+    bool validate(const char* transport_desc);
+    bool isTransportTypeSupported(const char* transport_type);
+    //    /* plugin-wide properties */
+    bool getProperty(const char* key, void* value, int* size);
+    bool setProperty(const char* key, const void* value, int size);
+
+    struct dtv_plugin* interface();
+    const char* pluginBasename();
+
+  protected:
+    const char* path_;
+    char* basename_;
+    void* module_;
+    struct dtv_plugin* interface_;
+    bool loaded_;
+};
+
+#endif  // LIVE_DTV_PLUGIN_H_