Cfi function attribute for codec factory

Declare cfi_canonical_jump_table for codec factory functions to avoid
cfi crashes.

Bug: 158010610
Bug: 173497308
Test: ran atest DecoderConformanceTest, ImageReaderDecoderTest,
VideoDecoderPerfTest, VideoEncoderTest.  Compare the
before and after enabling CFI results since there was a number of tests
that were initially failing.

Change-Id: I66f75314c32aaa2d5009f74fc764528343c012a5
diff --git a/media/codec2/components/opus/C2SoftOpusDec.cpp b/media/codec2/components/opus/C2SoftOpusDec.cpp
index b7c1556..d4987c0 100644
--- a/media/codec2/components/opus/C2SoftOpusDec.cpp
+++ b/media/codec2/components/opus/C2SoftOpusDec.cpp
@@ -473,11 +473,13 @@
 
 }  // namespace android
 
+__attribute__((cfi_canonical_jump_table))
 extern "C" ::C2ComponentFactory* CreateCodec2Factory() {
     ALOGV("in %s", __func__);
     return new ::android::C2SoftOpusDecFactory();
 }
 
+__attribute__((cfi_canonical_jump_table))
 extern "C" void DestroyCodec2Factory(::C2ComponentFactory* factory) {
     ALOGV("in %s", __func__);
     delete factory;