Revamp Storage Settings header part

1. Add new object StorageEntry to encapsulate VolumeInfo and
   unsupported DiskInfo and missing VolumeRecord.
2. Replaces StorageSummaryDonutPreference with UsageProgressBarPreference.
3. Add storage select spinner.
4. Add a "Free up storage" preference to replace "Manage storage" button.

Bug: 174964885
Test: atest com.android.settings.deviceinfo.storage
      atest com.android.settings.deviceinfo
      manual
      Insert an USB drive, select the drive in StorageDashboardFragment
      and observe UI.
Change-Id: I83877f76869414de4fb2788b6b18fe507aa5cfcf
Merged-In: I83877f76869414de4fb2788b6b18fe507aa5cfcf