Add storage dashborad page.

Refactor shared dashboard page display logic between storage and
system page.

Bug: 31800690
Test: RunSettingsRoboTests

Change-Id: I7eb86f590b79ab871bdb383fb2f5326790beb193
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 9319a22..a049d85 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -87,6 +87,7 @@
 import com.android.settings.deviceinfo.PublicVolumeSettings;
 import com.android.settings.deviceinfo.SimStatus;
 import com.android.settings.deviceinfo.Status;
+import com.android.settings.deviceinfo.StorageDashboardFragment;
 import com.android.settings.deviceinfo.StorageSettings;
 import com.android.settings.display.NightDisplaySettings;
 import com.android.settings.fuelgauge.BatterySaverSettings;
@@ -377,6 +378,7 @@
             ManageDomainUrls.class.getName(),
             AutomaticStorageManagerSettings.class.getName(),
             SupportFragment.class.getName(),
+            StorageDashboardFragment.class.getName(),
             SystemDashboardFragment.class.getName(),
     };