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