Change base fragment to InstrumentedFragment

- Modify PrivateVolumeForget, PrivateVolumeFormat, PrivateVolumeUnmount
- Add ShadowStorageManager
- Add test cases

Test: manual
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.deviceinfo

Change-Id: I6883dd12cec00abbc3099bf31d285e6fe455eba6
8 files changed