Add an option allowing to skip wallpaper apps selection.

This commit adds an option to the Settings application, making it
possible to launch a different activity for wallpaper selection

Also removing te intent constant android.settings.WALLPAPER_SETTINGS
The target for this action can't be easily overriden when the
wallpaper target is overriden, which would provide an inconsistant
experience.

Bug: 28554244
Bug: 26688904
Change-Id: I25367fbb4505615351fbad9e1aa1ca88df0cd034

AndroidManifest.xml

@@ -848,10 +848,6 @@
                   android:label="@string/wallpaper_settings_fragment_title"
                   android:icon="@drawable/ic_wallpaper"
                   android:taskAffinity="">
-            <intent-filter android:priority="1">
-                <action android:name="android.settings.WALLPAPER_SETTINGS" />
-                <category android:name="android.intent.category.DEFAULT" />
-            </intent-filter>
             <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                        android:value="com.android.settings.WallpaperTypeSettings" />
         </activity>

res/values/config.xml

@@ -40,4 +40,8 @@
 
     <!-- Fully-qualified class name for the implementation of the FeatureFactory to be instantiated. -->
     <string name="config_featureFactory" translatable="false">com.android.settings.overlay.FeatureFactoryImpl</string>
+
+    <!-- Package name and fully-qualified class name for the wallpaper picker activity. -->
+    <string name="config_wallpaper_picker_package" translatable="false">com.android.settings</string>
+    <string name="config_wallpaper_picker_class" translatable="false">com.android.settings.Settings$WallpaperSettingsActivity</string>
 </resources>

res/xml/display_settings.xml

@@ -45,8 +45,11 @@
                 android:key="wallpaper"
                 android:title="@string/wallpaper_settings_title"
                 settings:keywords="@string/keywords_display_wallpaper"
-                android:fragment="com.android.settings.WallpaperTypeSettings"
+                settings:useAdminDisabledSummary="true" >
-                settings:useAdminDisabledSummary="true" />
+                <intent
+                        android:targetPackage="@string/config_wallpaper_picker_package"
+                        android:targetClass="@string/config_wallpaper_picker_class" />
+        </com.android.settingslib.RestrictedPreference>
 
         <com.android.settings.TimeoutListPreference
                 android:key="screen_timeout"

src/com/android/settings/SettingsActivity.java

@@ -410,12 +410,7 @@ public class SettingsActivity extends SettingsDrawerActivity
 
     @Override
     public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
-        // Override the fragment title for Wallpaper settings
+        startPreferencePanel(pref.getFragment(), pref.getExtras(), -1, pref.getTitle(),
-        CharSequence title = pref.getTitle();
-        if (pref.getFragment().equals(WallpaperTypeSettings.class.getName())) {
-            title = getString(R.string.wallpaper_settings_fragment_title);
-        }
-        startPreferencePanel(pref.getFragment(), pref.getExtras(), -1, title,
                 null, 0);
         return true;
     }