Moving HelpUtils to SettingsLib

Moved HelpUtils to SettingsLib in frameworks/base so it can be shared by
packageinstaller as well.

Bug: b/22096093
Change-Id: I8d620abcde8279a3b4d11bbcff8ae9b6f46a1895

src/com/android/settings/SettingsPreferenceFragment.java

@@ -44,6 +44,7 @@ import android.view.ViewGroup;
 import android.widget.Button;
 import com.android.settings.applications.LayoutPreference;
 import com.android.settings.widget.FloatingActionButton;
+import com.android.settingslib.HelpUtils;
 
 import java.util.UUID;