transcoding: Fix the cts failure on older device with ACodec.

Bug: 196781253
Test: atest  -c CtsMediaTranscodingTestCases:MediaTranscodingManagerTest

Change-Id: I67d0c1dd893bb0bcc155f987bb27d0989e77be03
(cherry picked from commit 3a296455f4272c228b4fda563e34d7e9898ed7e4)
1 file changed