Fix float output capability check

Float output is only possible from API 21, but the high-res int
to float conversion path was checking for 32-bit PCM not float
output capability.

PiperOrigin-RevId: 231172495

library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java

@@ -419,7 +419,7 @@ public final class DefaultAudioSink implements AudioSink {
     isInputPcm = Util.isEncodingLinearPcm(inputEncoding);
     shouldConvertHighResIntPcmToFloat =
         enableConvertHighResIntPcmToFloat
-            && supportsOutput(channelCount, C.ENCODING_PCM_32BIT)
+            && supportsOutput(channelCount, C.ENCODING_PCM_FLOAT)
             && Util.isEncodingHighResolutionIntegerPcm(inputEncoding);
     if (isInputPcm) {
       pcmFrameSize = Util.getPcmFrameSize(inputEncoding, channelCount);