Make Level Info Optional for VP9 and H263

In case of VP9 and H263, level info is not contained in the bitstream.
If the CSD does not contain the level information, do not fail the test
for these two formats.
If the CSD contains level information for these two formats, ensure it
is according to the configuration.

Bug: 331169933
Test: atest android.mediav2.cts.EncoderProfileLevelTest#testValidateProfileLevel
Change-Id: Ic5ab0b3ae12b8517b80e8eb9cfcc15ea83633e47