Fix AudioCapabilities regression

Since DEFAULT_MAX_CHANNEL_COUNT was increased from 8 to 10,
getMaxSupportedChannelCountForPassthrough always throws if its loop
enters its second iteration (channelCount of 9). This is due to
Util.getAudioTrackChannelConfig returning CHANNEL_INVALID when passed a
channelCount of 9, and setting CHANNEL_INVALID as the AudioFormat's
channel mask throws an exception.

This change skips each iteration where CHANNEL_INVALID is returned.

Author: lawadr

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/AudioCapabilities.java

@@ -406,11 +406,15 @@ public static int getMaxSupportedChannelCountForPassthrough(
       // TODO(internal b/234351617): Query supported channel masks directly once it's supported,
       // see also b/25994457.
       for (int channelCount = DEFAULT_MAX_CHANNEL_COUNT; channelCount > 0; channelCount--) {
+        int channelConfig = Util.getAudioTrackChannelConfig(channelCount);
+        if (channelConfig == AudioFormat.CHANNEL_INVALID) {
+          continue;
+        }
         AudioFormat audioFormat =
             new AudioFormat.Builder()
                 .setEncoding(encoding)
                 .setSampleRate(sampleRate)
-                .setChannelMask(Util.getAudioTrackChannelConfig(channelCount))
+                .setChannelMask(channelConfig)
                 .build();
         if (AudioTrack.isDirectPlaybackSupported(audioFormat, DEFAULT_AUDIO_ATTRIBUTES)) {
           return channelCount;