Enable unit tests in postsubmit

The unit tests were marked as dynamic-presubmit and those are now
changed to postsubmit as these tests now use DynamicConfig.xml and
can download the required files without any extra arguments.

After some time of running these in postsubmit, these will be changed
to presubmit.

Bug: 304383609
Test: atest VorbisDecoderTest

Change-Id: Ibc14eac15621f1dd1a9c446aa5187c876ad6fe6b
1 file changed