Skip option missing on pattern lock screen

- Skip present during suw/deferred + non-fingerprint flow
- Skip hidden when opened from settings
- Skip hidden during suw/deferred when trying to setup up fingerprint

Test: Manually verified, robolectric tests updated
bug: 71763670
Change-Id: Ie3aac68a6d04c7727320af83532640580248bd47

src/com/android/settings/password/ChooseLockPattern.java

@@ -412,7 +412,7 @@ public class ChooseLockPattern extends SettingsActivity {
         private ChooseLockSettingsHelper mChooseLockSettingsHelper;
         private SaveAndFinishWorker mSaveAndFinishWorker;
         protected int mUserId;
-        private boolean mForFingerprint;
+        protected boolean mForFingerprint;
 
         private static final String KEY_UI_STAGE = "uiStage";
         private static final String KEY_PATTERN_CHOICE = "chosenPattern";
@@ -657,13 +657,7 @@ public class ChooseLockPattern extends SettingsActivity {
                 mFooterText.setText(stage.footerMessage);
             }
 
-            if (stage.leftMode == LeftButtonMode.Gone) {
-                mFooterLeftButton.setVisibility(View.GONE);
-            } else {
-                mFooterLeftButton.setVisibility(View.VISIBLE);
-                mFooterLeftButton.setText(stage.leftMode.text);
-                mFooterLeftButton.setEnabled(stage.leftMode.enabled);
-            }
+            updateFooterLeftButton(stage, mFooterLeftButton);
 
             setRightButtonText(stage.rightMode.text);
             setRightButtonEnabled(stage.rightMode.enabled);
@@ -713,6 +707,16 @@ public class ChooseLockPattern extends SettingsActivity {
             }
         }
 
+        protected void updateFooterLeftButton(Stage stage, TextView footerLeftButton) {
+            if (stage.leftMode == LeftButtonMode.Gone) {
+                footerLeftButton.setVisibility(View.GONE);
+            } else {
+                footerLeftButton.setVisibility(View.VISIBLE);
+                footerLeftButton.setText(stage.leftMode.text);
+                footerLeftButton.setEnabled(stage.leftMode.enabled);
+            }
+        }
+
         // clear the wrong pattern unless they have started a new one
         // already
         private void postClearPatternRunnable() {