Storage category UX changes in Storage Settings

- Change category types.
- Use Intent.ACTION_VIEW to show content of each category.
- Sort order of each category by storage size.

Bug: 170918505
Test: make RunSettingsRoboTests ROBOTEST_FILTER=StorageItemPreferenceTest
      make RunSettingsRoboTests ROBOTEST_FILTER=StorageItemPreferenceControllerTest
      manual
      Click each category in Storage Settings.
Change-Id: Ib7beb1779a0fcbfd7b8ec52446707b105fcebff5

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

@@ -35,6 +35,7 @@ public class StorageItemPreference extends Preference {
     private ProgressBar mProgressBar;
     private static final int PROGRESS_MAX = 100;
     private int mProgressPercent = UNINITIALIZED;
+    private long mStorageSize;
 
     public StorageItemPreference(Context context) {
         this(context, null);
@@ -47,6 +48,7 @@ public class StorageItemPreference extends Preference {
     }
 
     public void setStorageSize(long size, long total) {
+        mStorageSize = size;
         setSummary(
                 FileSizeFormatter.formatFileSize(
                         getContext(),
@@ -61,6 +63,10 @@ public class StorageItemPreference extends Preference {
         updateProgressBar();
     }
 
+    public long getStorageSize() {
+        return mStorageSize;
+    }
+
     protected void updateProgressBar() {
         if (mProgressBar == null || mProgressPercent == UNINITIALIZED)
             return;