Copy filtered av data to ion buffer to test on cuttlefish

Test: atest VtsHalTvTunerV1_0TargetTest
Bug: 150952766
Change-Id: If007f9c021102dc95be8e9dc70be70d3945192a9
diff --git a/tv/tuner/1.0/default/Frontend.cpp b/tv/tuner/1.0/default/Frontend.cpp
index 7e206a7..bb0d8dc 100644
--- a/tv/tuner/1.0/default/Frontend.cpp
+++ b/tv/tuner/1.0/default/Frontend.cpp
@@ -63,9 +63,6 @@
         return Result::INVALID_STATE;
     }
 
-    // TODO dynamically allocate file to the source file
-    mSourceStreamFile = FRONTEND_STREAM_FILE;
-
     mCallback->onEvent(FrontendEventType::LOCKED);
     return Result::SUCCESS;
 }
@@ -180,7 +177,7 @@
 }
 
 string Frontend::getSourceFile() {
-    return mSourceStreamFile;
+    return FRONTEND_STREAM_FILE;
 }
 
 }  // namespace implementation