For #4856 - Refactor InflationAwareFeatureTest

We previously had a test exactly for checking that "start does nothing" but we
now need to ensure that start actually is propagated to the inner feature that
is to rebind itself to the app to allow for user interactions.

app/src/test/java/org/mozilla/fenix/components/InflationAwareFeatureTest.kt

@@ -10,7 +10,6 @@ import org.junit.Test
 import org.mockito.Mockito.never
 import org.mockito.Mockito.spy
 import org.mockito.Mockito.verify
-import org.mockito.Mockito.verifyNoMoreInteractions
 import java.lang.ref.WeakReference
 
 class InflationAwareFeatureTest {
@@ -58,18 +57,14 @@ class InflationAwareFeatureTest {
     }
 
     @Test
-    fun `start does nothing`() {
-        val stub: ViewStub = mock()
-        val inflationFeature: InflationAwareFeature = spy(TestableInflationAwareFeature(stub))
+    fun `start should be delegated to the inner feature`() {
+        val inflationFeature: InflationAwareFeature = spy(TestableInflationAwareFeature(mock()))
         val innerFeature: LifecycleAwareFeature = mock()
-
         inflationFeature.feature = innerFeature
-        inflationFeature.view = WeakReference(mock())
 
         inflationFeature.start()
 
-        verifyNoMoreInteractions(innerFeature)
-        verifyNoMoreInteractions(stub)
+        verify(innerFeature).start()
     }
 
     @Test