Fixup 12492: Use builder instead of newBuilder

Author: sauravzg

xds/src/main/java/io/grpc/xds/internal/extauthz/ExtAuthzConfig.java

@@ -35,7 +35,7 @@
 public abstract class ExtAuthzConfig {
 
   /** Creates a new builder for creating {@link ExtAuthzConfig} instances. */
-  public static Builder newBuilder() {
+  public static Builder builder() {
     return new AutoValue_ExtAuthzConfig.Builder().allowedHeaders(ImmutableList.of())
         .disallowedHeaders(ImmutableList.of()).statusOnError(Status.PERMISSION_DENIED)
         .filterEnabled(Matchers.FractionMatcher.create(100, 100));

xds/src/main/java/io/grpc/xds/internal/extauthz/ExtAuthzConfigParser.java

@@ -56,7 +56,7 @@ public static ExtAuthzConfig parse(
     } catch (GrpcServiceParseException e) {
       throw new ExtAuthzParseException("Failed to parse GrpcService config: " + e.getMessage(), e);
     }
-    ExtAuthzConfig.Builder builder = ExtAuthzConfig.newBuilder().grpcService(grpcServiceConfig)
+    ExtAuthzConfig.Builder builder = ExtAuthzConfig.builder().grpcService(grpcServiceConfig)
         .failureModeAllow(extAuthzProto.getFailureModeAllow())
         .failureModeAllowHeaderAdd(extAuthzProto.getFailureModeAllowHeaderAdd())
         .includePeerCertificate(extAuthzProto.getIncludePeerCertificate())

xds/src/main/java/io/grpc/xds/internal/grpcservice/GrpcServiceConfig.java

@@ -31,7 +31,7 @@
 @AutoValue
 public abstract class GrpcServiceConfig {
 
-  public static Builder newBuilder() {
+  public static Builder builder() {
     return new AutoValue_GrpcServiceConfig.Builder();
   }
 

xds/src/main/java/io/grpc/xds/internal/grpcservice/GrpcServiceConfigParser.java

@@ -81,7 +81,7 @@ public static GrpcServiceConfig parse(GrpcService grpcServiceProto,
     GrpcServiceConfig.GoogleGrpcConfig googleGrpcConfig =
         parseGoogleGrpcConfig(grpcServiceProto.getGoogleGrpc(), contextProvider);
 
-    GrpcServiceConfig.Builder builder = GrpcServiceConfig.newBuilder().googleGrpc(googleGrpcConfig);
+    GrpcServiceConfig.Builder builder = GrpcServiceConfig.builder().googleGrpc(googleGrpcConfig);
 
     ImmutableList.Builder<HeaderValue> initialMetadata = ImmutableList.builder();
     for (io.envoyproxy.envoy.config.core.v3.HeaderValue header : grpcServiceProto