Add After to reset connection to online.

Change-Id: I71bc6279b4fc9fe12a4783d87b2ed43491cace04

app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarInsetsScreenshotTests.kt

@@ -72,6 +72,7 @@ import dagger.hilt.android.testing.HiltAndroidTest
 import dagger.hilt.android.testing.HiltTestApplication
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.runBlocking
+import org.junit.After
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
@@ -153,6 +154,11 @@ class SnackbarInsetsScreenshotTests {
         TimeZone.setDefault(TimeZone.getTimeZone("UTC"))
     }
 
+    @After
+    fun resetConnectionOnline() {
+        networkMonitor = TestNetworkMonitor().apply { setConnected(true) }
+    }
+
     @Test
     fun phone_noSnackbar() {
         testSnackbarScreenshotWithSize(