feat(generator): update protoc to v3.15.3

proto-google-cloud-mediatranslation-v1beta1/src/main/java/com/google/cloud/mediatranslation/v1beta1/StreamingTranslateSpeechRequest.java

@@ -255,6 +255,28 @@ public boolean hasStreamingConfig() {
   }
 
   public static final int AUDIO_CONTENT_FIELD_NUMBER = 2;
+  /**
+   *
+   *
+   * <pre>
+   * The audio data to be translated. Sequential chunks of audio data are sent
+   * in sequential `StreamingTranslateSpeechRequest` messages. The first
+   * `StreamingTranslateSpeechRequest` message must not contain
+   * `audio_content` data and all subsequent `StreamingTranslateSpeechRequest`
+   * messages must contain `audio_content` data. The audio bytes must be
+   * encoded as specified in `StreamingTranslateSpeechConfig`. Note: as with
+   * all bytes fields, protobuffers use a pure binary representation (not
+   * base64).
+   * </pre>
+   *
+   * <code>bytes audio_content = 2;</code>
+   *
+   * @return Whether the audioContent field is set.
+   */
+  @java.lang.Override
+  public boolean hasAudioContent() {
+    return streamingRequestCase_ == 2;
+  }
   /**
    *
    *
@@ -951,6 +973,27 @@ public Builder clearStreamingConfig() {
       return streamingConfigBuilder_;
     }
 
+    /**
+     *
+     *
+     * <pre>
+     * The audio data to be translated. Sequential chunks of audio data are sent
+     * in sequential `StreamingTranslateSpeechRequest` messages. The first
+     * `StreamingTranslateSpeechRequest` message must not contain
+     * `audio_content` data and all subsequent `StreamingTranslateSpeechRequest`
+     * messages must contain `audio_content` data. The audio bytes must be
+     * encoded as specified in `StreamingTranslateSpeechConfig`. Note: as with
+     * all bytes fields, protobuffers use a pure binary representation (not
+     * base64).
+     * </pre>
+     *
+     * <code>bytes audio_content = 2;</code>
+     *
+     * @return Whether the audioContent field is set.
+     */
+    public boolean hasAudioContent() {
+      return streamingRequestCase_ == 2;
+    }
     /**
      *
      *

proto-google-cloud-mediatranslation-v1beta1/src/main/java/com/google/cloud/mediatranslation/v1beta1/StreamingTranslateSpeechRequestOrBuilder.java

@@ -71,6 +71,25 @@ public interface StreamingTranslateSpeechRequestOrBuilder
   com.google.cloud.mediatranslation.v1beta1.StreamingTranslateSpeechConfigOrBuilder
       getStreamingConfigOrBuilder();
 
+  /**
+   *
+   *
+   * <pre>
+   * The audio data to be translated. Sequential chunks of audio data are sent
+   * in sequential `StreamingTranslateSpeechRequest` messages. The first
+   * `StreamingTranslateSpeechRequest` message must not contain
+   * `audio_content` data and all subsequent `StreamingTranslateSpeechRequest`
+   * messages must contain `audio_content` data. The audio bytes must be
+   * encoded as specified in `StreamingTranslateSpeechConfig`. Note: as with
+   * all bytes fields, protobuffers use a pure binary representation (not
+   * base64).
+   * </pre>
+   *
+   * <code>bytes audio_content = 2;</code>
+   *
+   * @return Whether the audioContent field is set.
+   */
+  boolean hasAudioContent();
   /**
    *
    *

synth.metadata

@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-mediatranslation.git",
-        "sha": "d006dd255388bd945e5be3b8ba7f3f1c6f977213"
+        "sha": "209abebf925e0bf803a5b10a7cb35a07c8ecef12"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "af8f71dae961ee036a0ac52a1965270149a6b2c9",
-        "internalRef": "358516065"
+        "sha": "f6dd7e47620566925a4b3f1ce029e74e1b2f2516",
+        "internalRef": "359781040"
       }
     },
     {