ServiceTestRule not support the Service whicha runs in a separat process

I'm writing the unit tests for MyService, which runs in a separate process `android:process=":ai"`, and the code like this:
```kotlin
//The Service:
class MyService: Service() {
inner class TestBinder() : Binder() {
fun getService() = this@MyService
}

override fun onBind(intent: Intent?): IBinder? {
return TestBinder()
}
}
//The test:
@RunWith(AndroidJUnit4::class)
internal class MyServiceTest {

private val rule = ServiceTestRule()

@Test
fun test() {
val binder = rule.bindService(Intent(ApplicationProvider.getApplicationContext(), MyService::class.java))
val service = (binder as MyService.TestBinder).getService()
}
}
```
But ClassCastException was thrown:
`java.lang.ClassCastException: android.os.BinderProxy cannot be cast to MyService$TestBinder`

But test works if I make MyService without separate process.

Start at ServiceTestRule.bindService and compare its behavior for the shown MyServiceTest when MyService runs in the default process versus the separate ":ai" process. Reproduce the ClassCastException with the provided example; done means the separate-process service can be bound without the BinderProxy cast failure.

Written by the indexing model from the issue text.