Make dvr tests a separate module

Test: atest VtsHalTvTunerV1_0TargetTest
Bug: 150989084
Change-Id: I35d717f357b176d5cbec5d154f4df30fd2c4a18e
diff --git a/tv/tuner/1.0/default/Demux.h b/tv/tuner/1.0/default/Demux.h
index 1405d0c..759e348 100644
--- a/tv/tuner/1.0/default/Demux.h
+++ b/tv/tuner/1.0/default/Demux.h
@@ -89,6 +89,7 @@
     void updateFilterOutput(uint16_t filterId, vector<uint8_t> data);
     uint16_t getFilterTpid(uint32_t filterId);
     void setIsRecording(bool isRecording);
+    void startFrontendInputLoop();
 
   private:
     // Tuner service
@@ -104,7 +105,6 @@
         uint32_t filterId;
     };
 
-    Result startFrontendInputLoop();
     static void* __threadLoopFrontend(void* user);
     void frontendInputThreadLoop();