Update UI to use a smaller icon for ManageApplication page.

- Rewrite preference_app.xml to have a small icon
- Update ApplicationViewHolder to hide/show summary row dynamically
  - but only do this for notification settings - this UI has empty
    summary for most row. For other UI, just keep the empty summary row
    until summary comes in. If we also hide/show summary row there will
    be a height change animation which is janky.

Bug : 65182905
Fixes: 63582851
Test: robotests

Change-Id: Ice67324f08c67e014a018dfc51e00fe4449036dd

src/com/android/settings/widget/RadioButtonPickerFragment.java

@@ -22,6 +22,7 @@ import android.os.Bundle;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.support.annotation.VisibleForTesting;
+import android.support.annotation.XmlRes;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceScreen;
 import android.text.TextUtils;
@@ -133,8 +134,13 @@ public abstract class RadioButtonPickerFragment extends InstrumentedPreferenceFr
         final String systemDefaultKey = getSystemDefaultKey();
         final PreferenceScreen screen = getPreferenceScreen();
         screen.removeAll();
+
+        final int customLayoutResId = getRadioButtomPreferenceCustomLayoutResId();
         if (shouldShowItemNone()) {
             final RadioButtonPreference nonePref = new RadioButtonPreference(getPrefContext());
+            if (customLayoutResId > 0) {
+                nonePref.setLayoutResource(customLayoutResId);
+            }
             nonePref.setIcon(R.drawable.ic_remove_circle);
             nonePref.setTitle(R.string.app_list_preference_none);
             nonePref.setChecked(TextUtils.isEmpty(defaultKey));
@@ -144,6 +150,9 @@ public abstract class RadioButtonPickerFragment extends InstrumentedPreferenceFr
         if (candidateList != null) {
             for (CandidateInfo info : candidateList) {
                 RadioButtonPreference pref = new RadioButtonPreference(getPrefContext());
+                if (customLayoutResId > 0) {
+                    pref.setLayoutResource(customLayoutResId);
+                }
                 bindPreference(pref, info.getKey(), info, defaultKey);
                 bindPreferenceExtra(pref, info.getKey(), info, defaultKey, systemDefaultKey);
                 screen.addPreference(pref);
@@ -206,6 +215,14 @@ public abstract class RadioButtonPickerFragment extends InstrumentedPreferenceFr
         return null;
     }
 
+    /**
+     * Provides a custom layout for each candidate row.
+     */
+    @XmlRes
+    protected int getRadioButtomPreferenceCustomLayoutResId() {
+        return 0;
+    }
+
     public static abstract class CandidateInfo {
 
         public final boolean enabled;