deps: update dependency com.google.auto.value:auto-value to v1.7.4 (#170)

Co-authored-by: Elliotte Rusty Harold <elharo@users.noreply.github.com>
Co-authored-by: Jeff Ching <chingor@google.com>

Author: 3 people

build.gradle

@@ -40,7 +40,7 @@ ext {
   libraries = [
       javax_annotations: 'javax.annotation:javax.annotation-api:1.3.2',
       auto_value_annotations: 'com.google.auto.value:auto-value-annotations:1.7.2',
-      auto_value: 'com.google.auto.value:auto-value:1.7.2',
+      auto_value: 'com.google.auto.value:auto-value:1.7.4',
       guava: 'com.google.guava:guava:29.0-android',
       jsr305: 'com.google.code.findbugs:jsr305:3.0.2',
       error_prone_annotations: 'com.google.errorprone:error_prone_annotations:2.3.4',