Rename ButtonFooterMixin to FooterBarMixin

1. Change to FooterBarMixin
2. Move FooterButton to the same package with FooterBarMixin

Bug: 120805516
Test: RunSettingsRoboTests
Change-Id: Ic6937e3cbc515dd7bf877c9193932cd5800ac801
diff --git a/src/com/android/settings/MasterClearConfirm.java b/src/com/android/settings/MasterClearConfirm.java
index de7cd06..c25f2af 100644
--- a/src/com/android/settings/MasterClearConfirm.java
+++ b/src/com/android/settings/MasterClearConfirm.java
@@ -45,9 +45,9 @@
 import com.android.settingslib.RestrictedLockUtilsInternal;
 
 import com.google.android.setupcompat.TemplateLayout;
-import com.google.android.setupcompat.item.FooterButton;
-import com.google.android.setupcompat.item.FooterButton.ButtonType;
-import com.google.android.setupcompat.template.ButtonFooterMixin;
+import com.google.android.setupcompat.template.FooterBarMixin;
+import com.google.android.setupcompat.template.FooterButton;
+import com.google.android.setupcompat.template.FooterButton.ButtonType;
 
 /**
  * Confirm and execute a reset of the device to a clean "just out of the box"
@@ -154,8 +154,8 @@
     private void establishFinalConfirmationState() {
         final TemplateLayout layout = mContentView.findViewById(R.id.setup_wizard_layout);
 
-        final ButtonFooterMixin buttonFooterMixin = layout.getMixin(ButtonFooterMixin.class);
-        buttonFooterMixin.setPrimaryButton(
+        final FooterBarMixin mixin = layout.getMixin(FooterBarMixin.class);
+        mixin.setPrimaryButton(
                 new FooterButton.Builder(getActivity())
                         .setText(R.string.master_clear_button_text)
                         .setListener(mFinalClickListener)