Settings search - Navigate user to exact page

- remove duplicate index preference
- default set searchable = false when the preference has fragment
- make some fragments indexable

Bug: 143057584
Test: robotest & manual

Change-Id: I4d64f6106d2f92f0a45e8c7e26388677f593f412

src/com/android/settings/core/PreferenceXmlParserUtils.java

@@ -89,6 +89,7 @@ public class PreferenceXmlParserUtils {
         int FLAG_NEED_PREF_APPEND = 1 << 10;
         int FLAG_UNAVAILABLE_SLICE_SUBTITLE = 1 << 11;
         int FLAG_FOR_WORK = 1 << 12;
+        int FLAG_NEED_FRAGMENT = 1 << 13;
     }
 
     public static final String METADATA_PREF_TYPE = "type";
@@ -102,6 +103,7 @@ public class PreferenceXmlParserUtils {
     public static final String METADATA_APPEND = "staticPreferenceLocation";
     public static final String METADATA_UNAVAILABLE_SLICE_SUBTITLE = "unavailable_slice_subtitle";
     public static final String METADATA_FOR_WORK = "for_work";
+    public static final String METADATA_FRAGMENT = "fragment";
 
     private static final String ENTRIES_SEPARATOR = "|";
 
@@ -250,6 +252,10 @@ public class PreferenceXmlParserUtils {
                 preferenceMetadata.putBoolean(METADATA_FOR_WORK,
                         isForWork(preferenceAttributes));
             }
+            if (hasFlag(flags, MetadataFlag.FLAG_NEED_FRAGMENT)) {
+                preferenceMetadata.putString(METADATA_FRAGMENT,
+                        getFragment(preferenceAttributes));
+            }
             metadata.add(preferenceMetadata);
 
             preferenceAttributes.recycle();
@@ -340,4 +346,9 @@ public class PreferenceXmlParserUtils {
         return styledAttributes.getBoolean(
                 R.styleable.Preference_forWork, false);
     }
+
+    private static String getFragment(TypedArray styledAttributes) {
+        return styledAttributes.getString(
+                com.android.internal.R.styleable.Preference_fragment);
+    }
 }