[Fingerprint] Disable back in setup enrolling screen

Disable the back button because the back stack behavior is confusing.
Instead of going back to the screen the user previously saw, pressing
back in enrolling screen goes back to FindSensor.

Bug: 22848016
Change-Id: I71852eb1974f1542fb519bf8bbfdce12de62e66b

diff --git a/src/com/android/settings/fingerprint/SetupFingerprintEnrollEnrolling.java b/src/com/android/settings/fingerprint/SetupFingerprintEnrollEnrolling.java
index 0de1718..fc7b803 100644 (file)
--- a/src/com/android/settings/fingerprint/SetupFingerprintEnrollEnrolling.java
+++ b/src/com/android/settings/fingerprint/SetupFingerprintEnrollEnrolling.java
@@ -53,6 +53,7 @@ public class SetupFingerprintEnrollEnrolling extends FingerprintEnrollEnrolling
         final NavigationBar navigationBar = getNavigationBar();
         navigationBar.setNavigationBarListener(this);
         navigationBar.getNextButton().setText(R.string.skip_label);
+        navigationBar.getBackButton().setVisibility(View.GONE);
     }
 
     @Override