Update android-setIsRunningInRobolectricTest-removed.md

src/docs/release/breaking-changes/android-setIsRunningInRobolectricTest-removed.md

@@ -8,15 +8,22 @@ description: The test-only FlutterMain.setIsRunningInRobolectricTest API on the
 If you write Java JUnit tests (such as Robolectric tests) against the Flutter
 engine's Java embedding and used the
 `FlutterMain.setIsRunningInRobolectricTest(true)` API, replace it with
-`FlutterInjector.setInstance(new FlutterInjector.Builder().setShouldLoadNative(false).build())`.
+
+```java
+FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
+FlutterInjector.setInstance(
+        new FlutterInjector.Builder()
+            .setFlutterLoader(new FlutterLoader(mockFlutterJNI))
+            .build());
+```
 
 This should be very uncommon.
 
 ## Context
 
 The `FlutterMain` class itself is being deprecated and replaced with the
-`FlutterInjector` class. The `FlutterMain` class itself used a number of
-static variables and functions than make it difficult to test. The
+`FlutterInjector` class. The `FlutterMain` class uses a number of
+static variables and functions than make it difficult to test.
 `FlutterMain.setIsRunningInRobolectricTest()` is one ad-hoc static
 mechanism to allow tests to run on the host machine on JVM without
 loading the libflutter.so native library (which can't be done on the host
@@ -27,8 +34,9 @@ in Flutter's Android/Java engine embedding are now moved to the
 [`FlutterInjector`](https://cs.opensource.google/flutter/engine/+/master:shell/platform/android/io/flutter/FlutterInjector.java)
 class.
 
-Within the `FlutterInjector` class, the `setShouldLoadNative()` Builder
-function allows for control of whether to load the native library.
+Within the `FlutterInjector` class, the `setFlutterLoader()` Builder
+function allows for control of how the [`FlutterLoader`](https://cs.opensource.google/flutter/engine/+/master:shell/platform/android/io/flutter/embedding/engine/loader/FlutterLoader.java)
+class locates and loads the libflutter.so library.
 
 ## Description of change
 
@@ -38,6 +46,9 @@ removes the `FlutterMain.setIsRunningInRobolectricTest()` testing function.
 https://github.com/flutter/engine/commit/15f5696c4139a21e1fc54014ce17d01f6ad1737c#diff-f928557f2d60773a8435366400fa42ed
 adds a `FlutterInjector` class to assist testing.
 
+https://github.com/flutter/engine/pull/20473 further refactors FlutterLoader and FlutterJNI
+to allow for additional mocking/testing.
+
 ## Migration guide
 
 Code before migration:
@@ -49,7 +60,11 @@ FlutterMain.setIsRunningInRobolectricTest(true);
 Code after migration:
 
 ```java
-FlutterInjector.setInstance(new FlutterInjector.Builder().setShouldLoadNative(false).build());
+FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
+FlutterInjector.setInstance(
+        new FlutterInjector.Builder()
+            .setFlutterLoader(new FlutterLoader(mockFlutterJNI))
+            .build());
 ```
 
 ## Timeline