To hide sorting animation.
- Storage Settings always loads cache and updates UI, then
loads storage size and updates UI.
Remove the chche design because storage category preferences
will hide during loading, it no meaning to load from cache
and update UI.
- Hides loading circle before storage category preferences
become visible, it prevents flickers.
- Remove Calculating... summary of StorageItemPreference.
- Private storage category preferences and secondary user
preference become visible at
StorageItemPreferenceController#onLoadFinished.
Bug: 188731179
Bug: 185547228
Bug: 188615591
Test: atest com.android.settings.deviceinfo
atest com.android.settings.deviceinfo.storage
make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.deviceinfo
make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.deviceinfo.storage
manual visual
Change-Id: I3ebef5829ef4f806add07f58fa02520804768be5