Correctly support restoring SIM specific settings

After restoring the data, we need to update the subscription
database cache.

Fix: 269062965
Test: atest android.telephony.cts.SubscriptionManagerTest#testRestoreAllSimSpecificSettingsFromBackup
Test: Boot up + Basic phone functionality tests
Change-Id: I2f8cb6418ee661a3cd8c02e3db6733cb12817d01