Clear CodecInfos on InputFormat if codec is null

In maybeInitCodecWithFallback, it caches availableCodecInfos with mediaCryptoRequiresSecureDecoder and inputFormat as inputs, and won't clear it if shouldInitCodec is false, resulting in a case where availableCodecInfos is not null and codec is null.
When we have a new format, it's reasonable to clear availableCodecInfos if codec is null. Otherwise we might not be able to properly initialize a new codec.

PiperOrigin-RevId: 329971796

library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecRenderer.java

@@ -1442,6 +1442,9 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
     }
 
     if (codec == null) {
+      if (!legacyKeepAvailableCodecInfosWithoutCodec()) {
+        availableCodecInfos = null;
+      }
       maybeInitCodecOrBypass();
       return;
     }
@@ -1507,6 +1510,14 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
   }
 
   /**
+   * Returns whether to keep available codec infos when the codec hasn't been initialized, which is
+   * the behavior before a bug fix. See also [Internal: b/162837741].
+   */
+  protected boolean legacyKeepAvailableCodecInfosWithoutCodec() {
+    return false;
+  }
+
+  /**
    * Called when one of the output formats changes.
    *
    * <p>The default implementation is a no-op.