Add CanIgnoreReturnValue annotation to HTTP Request Builder

Test: m
Change-Id: I927968066c1be58b2ed00f462d751dcbbfb12bd3
Bug: 295217638

2 files changed, 4 insertions, 0 deletions

diff --git a/Android.bp b/Android.bp
index 09d2bd9..333f0b3 100644
--- a/Android.bp
+++ b/Android.bp
@@ -22,6 +22,7 @@ java_defaults {
     libs: [
         "androidx.annotation_annotation",
         "auto_value_annotations",
+        "error_prone_annotations",
     ],
     plugins: ["auto_value_plugin"],
     sdk_version: "system_current",
diff --git a/java/com/android/libraries/entitlement/http/HttpRequest.java b/java/com/android/libraries/entitlement/http/HttpRequest.java
index 57b5561..ec5ca7a 100644
--- a/java/com/android/libraries/entitlement/http/HttpRequest.java
+++ b/java/com/android/libraries/entitlement/http/HttpRequest.java
@@ -26,6 +26,7 @@ import com.android.libraries.entitlement.CarrierConfig;
 import com.google.auto.value.AutoValue;
 import com.google.common.collect.ImmutableListMultimap;
 import com.google.common.net.HttpHeaders;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
 
 import org.json.JSONObject;
 
@@ -74,6 +75,7 @@ public abstract class HttpRequest {
         abstract ImmutableListMultimap.Builder<String, String> requestPropertiesBuilder();
 
         /** Adds an HTTP header field. */
+        @CanIgnoreReturnValue
         public Builder addRequestProperty(String key, String value) {
             requestPropertiesBuilder().put(key, value);
             return this;
@@ -84,6 +86,7 @@ public abstract class HttpRequest {
           * {@link #addRequestProperty(String, String)} multiple times with the same key and
           * one value at a time.
           */
+        @CanIgnoreReturnValue
         public Builder addRequestProperty(String key, List<String> value) {
             requestPropertiesBuilder().putAll(key, value);
             return this;