Un-ignore wPScreenshotTest completely

Commit 789eb20  that we reverted previously still built on a parent commit which had `@Ignore` on this test. I'm not sure why the WP screenshot test was `@Ignored` previously — possibly because it was failing and nobody had time to fix it? — but the whole point of re-enabling those — and just not run them during `build_and_run_instrumented_test` — is to be able to work back on the screenshot tests to make then pass again, so we'll need to re-enable them again anyway.

Author: AliSoftware

WordPress/src/androidTest/java/org/wordpress/android/ui/screenshots/WPScreenshotTest.java

@@ -49,8 +49,7 @@ public class WPScreenshotTest extends BaseTest {
 
 
     private DemoModeEnabler mDemoModeEnabler = new DemoModeEnabler();
-
-    @Ignore
+    
     @Test
     public void wPScreenshotTest() {
         if (!BuildConfig.IS_JETPACK_APP) {