[Wi-Fi][A11Y] Fix TalkBack lose focus in WifiSettings & WifiSettings2

Use stable ID feature of RecycleView to keep preference focus.

Bug: 126132618
Test: WifiSettingsTest
      WifiSettings2Test
      manual visual

Change-Id: Id73157b0935186c9a59d1ef68190d853f671ebc2

src/com/android/settings/wifi/WifiSettings.java

@@ -53,6 +53,8 @@ import android.widget.Toast;
 import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.LinkifyUtils;
 import com.android.settings.R;
@@ -443,6 +445,13 @@ public class WifiSettings extends RestrictedSettingsFragment
         }
     }
 
+    @Override
+    protected RecyclerView.Adapter onCreateAdapter(PreferenceScreen preferenceScreen) {
+        final RecyclerView.Adapter adapter = super.onCreateAdapter(preferenceScreen);
+        adapter.setHasStableIds(true);
+        return adapter;
+    }
+
     @Override
     public int getMetricsCategory() {
         return SettingsEnums.WIFI;

src/com/android/settings/wifi/WifiSettings2.java

@@ -48,6 +48,8 @@ import android.widget.Toast;
 import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.LinkifyUtils;
 import com.android.settings.R;
@@ -367,6 +369,13 @@ public class WifiSettings2 extends RestrictedSettingsFragment
         }
     }
 
+    @Override
+    protected RecyclerView.Adapter onCreateAdapter(PreferenceScreen preferenceScreen) {
+        final RecyclerView.Adapter adapter = super.onCreateAdapter(preferenceScreen);
+        adapter.setHasStableIds(true);
+        return adapter;
+    }
+
     @Override
     public int getMetricsCategory() {
         return SettingsEnums.WIFI;

tests/robotests/src/com/android/settings/wifi/WifiSettings2Test.java

@@ -43,6 +43,8 @@ import android.provider.Settings;
 
 import androidx.fragment.app.FragmentActivity;
 import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
 import com.android.settings.datausage.DataUsagePreference;
@@ -263,6 +265,15 @@ public class WifiSettings2Test {
         verify(mDataUsagePreference).setTemplate(any(), eq(0) /*subId*/, eq(null) /*service*/);
     }
 
+    @Test
+    public void onCreateAdapter_hasStableIdsTrue() {
+        final PreferenceScreen preferenceScreen = mock(PreferenceScreen.class);
+
+        RecyclerView.Adapter adapter = mWifiSettings2.onCreateAdapter(preferenceScreen);
+
+        assertThat(adapter.hasStableIds()).isTrue();
+    }
+
 // TODO(b/70983952): Add test for context menu
 //    @Test
 //    public void onCreateContextMenu_shouldHaveForgetMenuForConnectedAccessPreference() {

tests/robotests/src/com/android/settings/wifi/WifiSettingsTest.java

@@ -45,6 +45,8 @@ import android.view.View;
 
 import androidx.fragment.app.FragmentActivity;
 import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
 import com.android.settings.datausage.DataUsagePreference;
@@ -291,4 +293,13 @@ public class WifiSettingsTest {
 
         verify(menu).add(anyInt(), eq(WifiSettings.MENU_ID_FORGET), anyInt(), anyInt());
     }
+
+    @Test
+    public void onCreateAdapter_hasStableIdsTrue() {
+        final PreferenceScreen preferenceScreen = mock(PreferenceScreen.class);
+
+        RecyclerView.Adapter adapter = mWifiSettings.onCreateAdapter(preferenceScreen);
+
+        assertThat(adapter.hasStableIds()).isTrue();
+    }
 }