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: Ie9ba6ed493f73a8597fb5eb4dceb61e9a0c440d1