Revert MediaCodecSelector API change

Future changes for checking codec capabilities will go in the renderer rather
than in the codec selector, so the codec selector only needs a MIME type as
before.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208076716

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

@@ -270,11 +270,11 @@ public class MediaCodecAudioRenderer extends MediaCodecRenderer implements Media
       }
     }
     List<MediaCodecInfo> decoderInfos =
-        mediaCodecSelector.getDecoderInfos(format, requiresSecureDecryption);
+        mediaCodecSelector.getDecoderInfos(format.sampleMimeType, requiresSecureDecryption);
     if (decoderInfos.isEmpty()) {
       return requiresSecureDecryption
               && !mediaCodecSelector
-                  .getDecoderInfos(format, /* requiresSecureDecoder= */ false)
+                  .getDecoderInfos(format.sampleMimeType, /* requiresSecureDecoder= */ false)
                   .isEmpty()
           ? FORMAT_UNSUPPORTED_DRM
           : FORMAT_UNSUPPORTED_SUBTYPE;

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

@@ -392,7 +392,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
   protected List<MediaCodecInfo> getDecoderInfos(
       MediaCodecSelector mediaCodecSelector, Format format, boolean requiresSecureDecoder)
       throws DecoderQueryException {
-    return mediaCodecSelector.getDecoderInfos(format, requiresSecureDecoder);
+    return mediaCodecSelector.getDecoderInfos(format.sampleMimeType, requiresSecureDecoder);
   }
 
   /**

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

@@ -17,7 +17,6 @@ package com.google.android.exoplayer2.mediacodec;
 
 import android.media.MediaCodec;
 import android.support.annotation.Nullable;
-import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil.DecoderQueryException;
 import java.util.Collections;
 import java.util.List;
@@ -34,10 +33,10 @@ public interface MediaCodecSelector {
   MediaCodecSelector DEFAULT =
       new MediaCodecSelector() {
         @Override
-        public List<MediaCodecInfo> getDecoderInfos(Format format, boolean requiresSecureDecoder)
+        public List<MediaCodecInfo> getDecoderInfos(String mimeType, boolean requiresSecureDecoder)
             throws DecoderQueryException {
           List<MediaCodecInfo> decoderInfos =
-              MediaCodecUtil.getDecoderInfos(format.sampleMimeType, requiresSecureDecoder);
+              MediaCodecUtil.getDecoderInfos(mimeType, requiresSecureDecoder);
           return decoderInfos.isEmpty()
               ? Collections.emptyList()
               : Collections.singletonList(decoderInfos.get(0));
@@ -60,9 +59,9 @@ public interface MediaCodecSelector {
   MediaCodecSelector DEFAULT_WITH_FALLBACK =
       new MediaCodecSelector() {
         @Override
-        public List<MediaCodecInfo> getDecoderInfos(Format format, boolean requiresSecureDecoder)
+        public List<MediaCodecInfo> getDecoderInfos(String mimeType, boolean requiresSecureDecoder)
             throws DecoderQueryException {
-          return MediaCodecUtil.getDecoderInfos(format.sampleMimeType, requiresSecureDecoder);
+          return MediaCodecUtil.getDecoderInfos(mimeType, requiresSecureDecoder);
         }
 
         @Override
@@ -72,14 +71,14 @@ public interface MediaCodecSelector {
       };
 
   /**
-   * Returns a list of decoders that can decode media in the specified format, in priority order.
+   * Returns a list of decoders that can decode media in the specified MIME type, in priority order.
    *
-   * @param format The format for which a decoder is required.
+   * @param mimeType The MIME type for which a decoder is required.
    * @param requiresSecureDecoder Whether a secure decoder is required.
    * @return A list of {@link MediaCodecInfo}s corresponding to decoders. May be empty.
    * @throws DecoderQueryException Thrown if there was an error querying decoders.
    */
-  List<MediaCodecInfo> getDecoderInfos(Format format, boolean requiresSecureDecoder)
+  List<MediaCodecInfo> getDecoderInfos(String mimeType, boolean requiresSecureDecoder)
       throws DecoderQueryException;
 
   /**

library/core/src/main/java/com/google/android/exoplayer2/video/MediaCodecVideoRenderer.java

@@ -246,11 +246,11 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer {
       }
     }
     List<MediaCodecInfo> decoderInfos =
-        mediaCodecSelector.getDecoderInfos(format, requiresSecureDecryption);
+        mediaCodecSelector.getDecoderInfos(format.sampleMimeType, requiresSecureDecryption);
     if (decoderInfos.isEmpty()) {
       return requiresSecureDecryption
               && !mediaCodecSelector
-                  .getDecoderInfos(format, /* requiresSecureDecoder= */ false)
+                  .getDecoderInfos(format.sampleMimeType, /* requiresSecureDecoder= */ false)
                   .isEmpty()
           ? FORMAT_UNSUPPORTED_DRM
           : FORMAT_UNSUPPORTED_SUBTYPE;