Fix warning about potential integer overflow in DefaultAudioSink

PiperOrigin-RevId: 444221415

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

@@ -1008,7 +1008,7 @@ public final class DefaultAudioSink implements AudioSink {
       if (configuration.outputMode == OUTPUT_MODE_PCM) {
         submittedPcmBytes += buffer.remaining();
       } else {
-        submittedEncodedFrames += framesPerEncodedSample * encodedAccessUnitCount;
+        submittedEncodedFrames += (long) framesPerEncodedSample * encodedAccessUnitCount;
       }
 
       inputBuffer = buffer;
@@ -1203,7 +1203,7 @@ public final class DefaultAudioSink implements AudioSink {
         // When playing non-PCM, the inputBuffer is never processed, thus the last inputBuffer
         // must be the current input buffer.
         Assertions.checkState(buffer == inputBuffer);
-        writtenEncodedFrames += framesPerEncodedSample * inputBufferAccessUnitCount;
+        writtenEncodedFrames += (long) framesPerEncodedSample * inputBufferAccessUnitCount;
       }
       outputBuffer = null;
     }