Dont test MediaFormat.KEY_MAX_OUTPUT_CHANNEL_COUNT before Android T

Bug: 226424823
Test: atest android.media.decoder.cts.DecoderTestAacFormat
Test: mts-tradefed run commandAndExit mts -m CtsMediaDecoderTestCases -t
Test: android.media.decoder.cts.DecoderTestAacFormat (on R devices)
Change-Id: I3f901a28cd8d04a6c05710a937701efa3254b856
1 file changed