Suppress ErrorProne CheckReturnValue check for some tests

These have been flagged by Google's ErrorProne linter.

integration_tests/ctesque/src/sharedTest/java/android/graphics/drawable/GradientDrawableTest.java

@@ -73,6 +73,7 @@ public void setup() {
     mResources = InstrumentationRegistry.getInstrumentation().getTargetContext().getResources();
   }
 
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void testConstructor() {
     int[] color = new int[] {1, 2, 3};

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativeHardwareRendererObserverTest.java

@@ -18,6 +18,7 @@
 @RunWith(RobolectricTestRunner.class)
 public class ShadowNativeHardwareRendererObserverTest {
 
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void test_hardwareRenderer() {
     OnFrameMetricsAvailableListener listener = i -> {};

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativeHardwareRendererTest.java

@@ -33,6 +33,7 @@
 @RunWith(RobolectricTestRunner.class)
 public class ShadowNativeHardwareRendererTest {
 
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void test_hardwareRenderer() {
     new HardwareRenderer();

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativeMaskFilterTest.java

@@ -11,6 +11,7 @@
 @RunWith(AndroidJUnit4.class)
 @Config(minSdk = O)
 public class ShadowNativeMaskFilterTest {
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void testConstructor() {
     new MaskFilter();

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativePathEffectTest.java

@@ -12,6 +12,7 @@
 @Config(minSdk = O)
 public class ShadowNativePathEffectTest {
 
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void testConstructor() {
     new PathEffect();

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativeRuntimeShaderTest.java

@@ -68,6 +68,7 @@ public void testConstructor() {
   }
 
   /** {@link #SKSL} does not compile on V and above. */
+  @SuppressWarnings("CheckReturnValue")
   @Config(minSdk = TIRAMISU, maxSdk = U.SDK_INT)
   @Test
   public void testConstructorT() {

integration_tests/nativegraphics/src/test/java/org/robolectric/shadows/ShadowNativeShaderTest.java

@@ -20,6 +20,7 @@
 @RunWith(AndroidJUnit4.class)
 @Config(minSdk = O)
 public class ShadowNativeShaderTest {
+  @SuppressWarnings("CheckReturnValue")
   @Test
   public void testConstructor() {
     new Shader();