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: Ibbe85739edc1ed1be50ab29fbc3b63969340186a
diff --git a/tv/tuner/aidl/default/Timer.h b/tv/tuner/aidl/default/Timer.h
new file mode 100644
index 0000000..c6327cb
--- /dev/null
+++ b/tv/tuner/aidl/default/Timer.h
@@ -0,0 +1,17 @@
+#include <chrono>
+using namespace std::chrono;
+class Timer {
+  public:
+    Timer() { start_time = steady_clock::now(); }
+
+    ~Timer() { stop_time = steady_clock::now(); }
+
+    double get_elapsed_time_ms() {
+        auto current_time = std::chrono::steady_clock::now();
+        return duration_cast<milliseconds>(current_time - start_time).count();
+    }
+
+  private:
+    time_point<steady_clock> start_time;
+    time_point<steady_clock> stop_time;
+};
\ No newline at end of file