Drop SDK 19 tests (2)

Summary:
The next Robolectric release drops support for SDK 19 (KitKat). Nearly all apps are min SDK 21+ anyway.

The strategy here:
- If a test was explicitly designed to test a pre-21 code path, just remove it
- If the test passes on the latest SDK, just remove the SDK-19 config
- else, pin the test on SDK 21, punting the issue.

Reviewed By: jiawei-lyu, xiphirx

Differential Revision: D59983594

fbshipit-source-id: e12b660b3f9af4fb62a29265e7e4b80d7eacdb5d

android/src/test/java/com/facebook/flipper/plugins/inspector/InspectorFlipperPluginTest.java

@@ -42,7 +42,7 @@
 
 @LooperMode(LEGACY)
 @RunWith(RobolectricTestRunner.class)
-@Config(sdk = 19)
+@Config(sdk = 21)
 public class InspectorFlipperPluginTest {
 
   private MockApplicationDescriptor mApplicationDescriptor;
@@ -297,7 +297,7 @@ protected NodeDescriptor<Object> descriptorForObject(Object obj) {
                                         .put("1", new FlipperObject.Builder()))))
                 .put(
                     "path",
-                    new FlipperArray.Builder().put("com.facebook.flipper").put("test").put("1"))
+                    new FlipperArray.Builder().put("com.facebook.flipper").put("test").put("3"))
                 .build()));
   }