Move "Build Number" slice to a different controller.

There are 2 build number tiles in settings: Android version -> Build
number and About phone -> build number.

The way we index breadcrumb for each slice is making some client
confused. So this change moves the slice capability from Androi
version>BuildNumber to About phone.

Fixes: 130652710
Test: reindex, robotest
Change-Id: I9054d0db124b706e7984cd3d19774bb604bd7fd3

src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java

@@ -38,6 +38,7 @@ import com.android.settings.core.BasePreferenceController;
 import com.android.settings.core.InstrumentedPreferenceFragment;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.password.ChooseLockSettingsHelper;
+import com.android.settings.slices.Sliceable;
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedLockUtilsInternal;
 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
@@ -91,7 +92,27 @@ public class BuildNumberPreferenceController extends BasePreferenceController im
 
     @Override
     public int getAvailabilityStatus() {
-        return AVAILABLE_UNSEARCHABLE;
+        return AVAILABLE;
+    }
+
+    @Override
+    public boolean isSliceable() {
+        return true;
+    }
+
+    @Override
+    public boolean isCopyableSlice() {
+        return true;
+    }
+
+    @Override
+    public boolean useDynamicSliceSummary() {
+        return true;
+    }
+
+    @Override
+    public void copy() {
+        Sliceable.setCopyContent(mContext, getSummary(), mContext.getText(R.string.build_number));
     }
 
     @Override