Remove redundant toolbar from CollapsingToolbarLayout

The new material library has been updated to be able to support
android.widget.Toolbar, so the redundant toolbar has to be removed.

Bug: 176882938
Test: visual verified
Change-Id: Ibada6b9d315c14d79e9f9f8015cbb5e00fbeea38
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 7f214f6..1c2952a 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -288,9 +288,7 @@
         if (actionBar != null) {
             actionBar.setDisplayHomeAsUpEnabled(!isInSetupWizard);
             actionBar.setHomeButtonEnabled(!isInSetupWizard);
-            // TODO(b/176882938): Enable title after material component updated
-            // If CollapsingToolbarLayout is applied, the old action bar won't show title.
-            actionBar.setDisplayShowTitleEnabled(mCollapsingToolbarLayout == null);
+            actionBar.setDisplayShowTitleEnabled(true);
         }
         mSwitchBar = findViewById(R.id.switch_bar);
         if (mSwitchBar != null) {