Do not flush eac3(joc) decoder on reuse

eac3(joc) decoders do not need to be flushed to be reused for the next
compatible track. This change allows for gapless playback on devices
with Dolby decoders that require internal re-initialization on flush.

Author: dwhea

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/mediacodec/MediaCodecInfo.java

@@ -479,6 +479,17 @@ public DecoderReuseEvaluation canReuseCodec(Format oldFormat, Format newFormat)
         }
       }
 
+      // For eac3 and eac3-joc formats, adaptation is possible without reconfiguration or flushing.
+      if (discardReasons == 0 && (MimeTypes.AUDIO_E_AC3_JOC.equals(mimeType)
+          || MimeTypes.AUDIO_E_AC3.equals(mimeType))) {
+        return new DecoderReuseEvaluation(
+            name,
+            oldFormat,
+            newFormat,
+            REUSE_RESULT_YES_WITHOUT_RECONFIGURATION,
+            /* discardReasons= */ 0);
+      }
+
       if (!oldFormat.initializationDataEquals(newFormat)) {
         discardReasons |= DISCARD_REASON_INITIALIZATION_DATA_CHANGED;
       }