Rename back button to navigate up button

A minor wording review.

Test: build pass
Bug: 219000314
Change-Id: I23bc580b193cc891b659514d13705db2c55b756a
Merged-In: I23bc580b193cc891b659514d13705db2c55b756a
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 37d4a4e..d258cc2 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -144,8 +144,7 @@
 
     public static final String EXTRA_SHOW_FRAGMENT_AS_SUBSETTING =
             ":settings:show_fragment_as_subsetting";
-    public static final String EXTRA_IS_SECONDARY_LAYER_PAGE =
-            ":settings:is_secondary_layer_page";
+    public static final String EXTRA_IS_SECOND_LAYER_PAGE = ":settings:is_second_layer_page";
 
     /**
      * Additional extra of Settings#ACTION_SETTINGS_LARGE_SCREEN_DEEP_LINK.
@@ -372,12 +371,12 @@
         if (WizardManagerHelper.isAnySetupWizard(intent)) {
             return false;
         }
-        final boolean isSecondaryLayerPage =
-                intent.getBooleanExtra(EXTRA_IS_SECONDARY_LAYER_PAGE, false);
+        final boolean isSecondLayerPage =
+                intent.getBooleanExtra(EXTRA_IS_SECOND_LAYER_PAGE, false);
 
         // TODO: move Settings's ActivityEmbeddingUtils to SettingsLib.
         return !com.android.settingslib.activityembedding.ActivityEmbeddingUtils
-                        .shouldHideBackButton(this, isSecondaryLayerPage);
+                        .shouldHideNavigateUpButton(this, isSecondLayerPage);
     }
 
     private boolean isSubSettings(Intent intent) {