Add entrypoint for Learn More in PS settings & Setup intro

Screenshots:
go/ss/RXhN57DSuSj7aQf.png
go/ss/5xcbx3mWeo2sZ37.png

Bug: 326059389
Test: atest PrivateSpaceFooterPreferenceControllerTest
Change-Id: I72beb1a04ea11909643dd6b455575478cfb5d87c

src/com/android/settings/privatespace/PrivateSpaceEducation.java

@@ -19,10 +19,12 @@ package com.android.settings.privatespace;
 import android.app.Activity;
 import android.app.settings.SettingsEnums;
 import android.os.Bundle;
+import android.text.util.Linkify;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.TextView;
 
 import androidx.annotation.Nullable;
 import androidx.navigation.fragment.NavHostFragment;
@@ -34,6 +36,8 @@ import com.google.android.setupcompat.template.FooterBarMixin;
 import com.google.android.setupcompat.template.FooterButton;
 import com.google.android.setupdesign.GlifLayout;
 
+import java.util.regex.Pattern;
+
 /** Fragment educating about the usage of Private Space. */
 public class PrivateSpaceEducation extends InstrumentedFragment {
     private static final String TAG = "PrivateSpaceEducation";
@@ -66,6 +70,13 @@ public class PrivateSpaceEducation extends InstrumentedFragment {
                         .setTheme(com.google.android.setupdesign.R.style.SudGlifButton_Secondary)
                         .build());
 
+        TextView infoTextView = rootView.findViewById(R.id.learn_more);
+        Pattern pattern = Pattern.compile(infoTextView.getText().toString());
+        Linkify.addLinks(
+                infoTextView,
+                pattern,
+                getContext().getString(R.string.private_space_learn_more_url));
+
         return rootView;
     }