TextInput: Avoid firing onSubmitEditing twice on Android

Summary:
For returnKeyType 'go', 'search' and 'send' Android will call
onEditorAction twice, once with IME_NULL and another time with the respective IME_ACTION.
This change makes sure to only fire one onSubmitEditing by always returning true in onEditorAction, which causes no subsequent events to be fired by android.

Fixes #10443

**Test plan**

1. Create view with TextInput having 'go', 'search' or 'send as `returnKeyType`
```javascript
<View>
           <TextInput
                returnKeyType='search'
                onSubmitEditing={event => console.log('submit search')}></TextInput>

           <TextInput
                returnKeyType='go'
                onSubmitEditing={event => console.log('submit go')}></TextInput>

         <TextInput
              returnKeyType='send'
              onSubmitEditing={event => console.log('submit send')}></TextInput>
</View>
```

2. Input some text and click submit button in soft keyboard
3. See event fired only once instead of two times
Closes https://github.com/facebook/react-native/pull/11006

Differential Revision: D4439110

Pulled By: hramos

fbshipit-source-id: 5573b7f15f862b432600ddd3d61a0852ce51b2b3

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java

@@ -688,14 +688,12 @@ public class ReactTextInputManager extends BaseViewManager<ReactEditText, Layout
                       editText.getId(),
                       editText.getText().toString()));
             }
-            if (actionId == EditorInfo.IME_ACTION_NEXT ||
-              actionId == EditorInfo.IME_ACTION_PREVIOUS) {
-              if (editText.getBlurOnSubmit()) {
-                editText.clearFocus();
-              }
-              return true;
+
+            if (editText.getBlurOnSubmit()) {
+              editText.clearFocus();
             }
-            return !editText.getBlurOnSubmit();
+
+            return true;
           }
         });
   }