Fingerprint image is not important for a11y announcements

Fixes: 187338706
Test: manual
Change-Id: Ic0eac21d0265b5fceb0ab71e013932d3629645b3
diff --git a/res/layout/fingerprint_enroll_finish_base.xml b/res/layout/fingerprint_enroll_finish_base.xml
index 262374d..48831dc 100644
--- a/res/layout/fingerprint_enroll_finish_base.xml
+++ b/res/layout/fingerprint_enroll_finish_base.xml
@@ -52,6 +52,7 @@
                     android:layout_height="match_parent"
                     android:padding="7dp"
                     android:contentDescription="@android:string/fingerprint_icon_content_description"
+                    android:importantForAccessibility="no"
                     android:src="@drawable/fingerprint_enroll_finish" />
             </com.google.android.setupdesign.view.FillContentLayout>