Add fixes in prep for enabling CheckReturnValue on constructors.

RELNOTES=n/a
PiperOrigin-RevId: 422573390

Author: kluever

android/guava-tests/test/com/google/common/collect/RegularImmutableAsListTest.java

@@ -30,7 +30,8 @@ public class RegularImmutableAsListTest extends TestCase {
    */
   public void testDoesntCheckForNull() {
     ImmutableSet<Integer> set = ImmutableSet.of(1, 2, 3);
-    new RegularImmutableAsList<Integer>(set, new Object[] {null, null, null});
+    ImmutableList<Integer> unused =
+        new RegularImmutableAsList<Integer>(set, new Object[] {null, null, null});
     // shouldn't throw!
   }
 }

android/guava-tests/test/com/google/common/reflect/InvokableTest.java

@@ -601,7 +601,7 @@ public void run() {
   }
 
   public void testAnonymousClassInConstructor() {
-    new AnonymousClassInConstructor();
+    AnonymousClassInConstructor unused = new AnonymousClassInConstructor();
   }
 
   private static class AnonymousClassInConstructor {
@@ -621,7 +621,7 @@ public void run() {
   }
 
   public void testLocalClassInInstanceInitializer() {
-    new LocalClassInInstanceInitializer();
+    LocalClassInInstanceInitializer unused = new LocalClassInInstanceInitializer();
   }
 
   private static class LocalClassInInstanceInitializer {
@@ -633,7 +633,7 @@ class Local {}
   }
 
   public void testLocalClassInStaticInitializer() {
-    new LocalClassInStaticInitializer();
+    LocalClassInStaticInitializer unused = new LocalClassInStaticInitializer();
   }
 
   private static class LocalClassInStaticInitializer {
@@ -645,7 +645,8 @@ class Local {}
   }
 
   public void testLocalClassWithSeeminglyHiddenThisInStaticInitializer_BUG() {
-    new LocalClassWithSeeminglyHiddenThisInStaticInitializer();
+    LocalClassWithSeeminglyHiddenThisInStaticInitializer unused =
+        new LocalClassWithSeeminglyHiddenThisInStaticInitializer();
   }
 
   /**

guava-tests/test/com/google/common/collect/RegularImmutableAsListTest.java

@@ -30,7 +30,8 @@ public class RegularImmutableAsListTest extends TestCase {
    */
   public void testDoesntCheckForNull() {
     ImmutableSet<Integer> set = ImmutableSet.of(1, 2, 3);
-    new RegularImmutableAsList<Integer>(set, new Object[] {null, null, null});
+    ImmutableList<Integer> unused =
+        new RegularImmutableAsList<Integer>(set, new Object[] {null, null, null});
     // shouldn't throw!
   }
 }

guava-tests/test/com/google/common/reflect/InvokableTest.java

@@ -601,7 +601,7 @@ public void run() {
   }
 
   public void testAnonymousClassInConstructor() {
-    new AnonymousClassInConstructor();
+    AnonymousClassInConstructor unused = new AnonymousClassInConstructor();
   }
 
   private static class AnonymousClassInConstructor {
@@ -621,7 +621,7 @@ public void run() {
   }
 
   public void testLocalClassInInstanceInitializer() {
-    new LocalClassInInstanceInitializer();
+    LocalClassInInstanceInitializer unused = new LocalClassInInstanceInitializer();
   }
 
   private static class LocalClassInInstanceInitializer {
@@ -633,7 +633,7 @@ class Local {}
   }
 
   public void testLocalClassInStaticInitializer() {
-    new LocalClassInStaticInitializer();
+    LocalClassInStaticInitializer unused = new LocalClassInStaticInitializer();
   }
 
   private static class LocalClassInStaticInitializer {
@@ -645,7 +645,8 @@ class Local {}
   }
 
   public void testLocalClassWithSeeminglyHiddenThisInStaticInitializer_BUG() {
-    new LocalClassWithSeeminglyHiddenThisInStaticInitializer();
+    LocalClassWithSeeminglyHiddenThisInStaticInitializer unused =
+        new LocalClassWithSeeminglyHiddenThisInStaticInitializer();
   }
 
   /**