Separate timestamps in AdaptiveDecodeTest

add 33ms offset to timestampOffset to avoid identical timestamp on
AdaptiveDecodeTest

Bug: 175284392
Test: Codec2VideoDecHidlTest.AdaptiveDecodeTest
Change-Id: I76ad535f5ad2e9c3c50d501a0f4ab053999787d3
diff --git a/media/codec2/hidl/1.0/vts/functional/video/VtsHalMediaC2V1_0TargetVideoDecTest.cpp b/media/codec2/hidl/1.0/vts/functional/video/VtsHalMediaC2V1_0TargetVideoDecTest.cpp
index 12ed725..b520c17 100644
--- a/media/codec2/hidl/1.0/vts/functional/video/VtsHalMediaC2V1_0TargetVideoDecTest.cpp
+++ b/media/codec2/hidl/1.0/vts/functional/video/VtsHalMediaC2V1_0TargetVideoDecTest.cpp
@@ -734,7 +734,7 @@
             }
             if (timestampMax < timestamp) timestampMax = timestamp;
         }
-        timestampOffset = timestampMax;
+        timestampOffset = timestampMax + 33333;
         eleInfo.close();
 
         // Reset Total frames before second decode loop