Add basic shadow tro prevent NPE when dereferencing.
diff --git a/shadows/framework/src/main/java/org/robolectric/shadows/ShadowAutofillManager.java b/shadows/framework/src/main/java/org/robolectric/shadows/ShadowAutofillManager.java
new file mode 100644
index 0000000..8ad93f1
--- /dev/null
+++ b/shadows/framework/src/main/java/org/robolectric/shadows/ShadowAutofillManager.java
@@ -0,0 +1,22 @@
+package org.robolectric.shadows;
+
+import static android.os.Build.VERSION_CODES.O;
+
+import android.service.autofill.FillEventHistory;
+import android.view.autofill.AutofillManager;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+/**
+ * Robolectric implementation of {@link android.os.AutofillManager}.
+ */
+@Implements(value = AutofillManager.class, minSdk = O)
+public class ShadowAutofillManager {
+
+  @Implementation
+  protected FillEventHistory getFillEventHistory() {
+    return null;
+  }
+}
+