Add missing cases to IntDef switch + fix default locale usage

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209396260

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

@@ -98,6 +98,8 @@ import java.nio.ByteOrder;
         break;
       case C.ENCODING_PCM_16BIT:
       case C.ENCODING_PCM_FLOAT:
+      case C.ENCODING_PCM_A_LAW:
+      case C.ENCODING_PCM_MU_LAW:
       case C.ENCODING_INVALID:
       case Format.NO_VALUE:
       default:
@@ -134,6 +136,8 @@ import java.nio.ByteOrder;
         break;
       case C.ENCODING_PCM_16BIT:
       case C.ENCODING_PCM_FLOAT:
+      case C.ENCODING_PCM_A_LAW:
+      case C.ENCODING_PCM_MU_LAW:
       case C.ENCODING_INVALID:
       case Format.NO_VALUE:
       default:

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/DefaultContentMetadata.java

@@ -188,9 +188,12 @@ public final class DefaultContentMetadata implements ContentMetadata {
       byte[] bytes = getBytes(value);
       if (bytes.length > MAX_VALUE_LENGTH) {
         throw new IllegalArgumentException(
-            String.format(
-                "The size of %s (%d) is greater than maximum allowed: %d",
-                name, bytes.length, MAX_VALUE_LENGTH));
+            "The size of "
+                + name
+                + " ("
+                + bytes.length
+                + ") is greater than maximum allowed: "
+                + MAX_VALUE_LENGTH);
       }
       metadata.put(name, bytes);
     }

library/core/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -1245,6 +1245,8 @@ public final class Util {
       case C.ENCODING_PCM_32BIT:
       case C.ENCODING_PCM_FLOAT:
         return channelCount * 4;
+      case C.ENCODING_PCM_A_LAW:
+      case C.ENCODING_PCM_MU_LAW:
       case C.ENCODING_INVALID:
       case Format.NO_VALUE:
       default:
@@ -1325,6 +1327,7 @@ public final class Util {
       case C.USAGE_NOTIFICATION_EVENT:
         return C.STREAM_TYPE_NOTIFICATION;
       case C.USAGE_ASSISTANCE_ACCESSIBILITY:
+      case C.USAGE_ASSISTANT:
       case C.USAGE_UNKNOWN:
       default:
         return C.STREAM_TYPE_DEFAULT;