codec2: Add support for sync frames in hevc encoder plugin

Bug: 135515629
Test: set forceGoogleEncoder to true in VideoCodecTestBase.java
Test: atest android.media.cts.VideoCodecTes.testSyncFrameHEVCCBR

Change-Id: I869506d13d695b90a280d9bcd42c307043269b74
diff --git a/media/codec2/components/hevc/C2SoftHevcEnc.h b/media/codec2/components/hevc/C2SoftHevcEnc.h
index 140b4a9..5ea4602 100644
--- a/media/codec2/components/hevc/C2SoftHevcEnc.h
+++ b/media/codec2/components/hevc/C2SoftHevcEnc.h
@@ -88,6 +88,7 @@
     std::shared_ptr<C2StreamComplexityTuning::output> mComplexity;
     std::shared_ptr<C2StreamQualityTuning::output> mQuality;
     std::shared_ptr<C2StreamGopTuning::output> mGop;
+    std::shared_ptr<C2StreamRequestSyncFrameTuning::output> mRequestSync;
 #ifdef FILE_DUMP_ENABLE
     char mInFile[200];
     char mOutFile[200];