Cache getActiveDataSubscriptionId Binder calls

Use PropertyInvalidatedCache to avoid redundant
calls to SubscriptionController.getActiveDataSubscriptionId.
Bug: 151953109
Test: Verified cache operated correctly when phone process is killed.
Test: atest SubscriptionControllerTest
Test: atest android.telephony.cts.SubscriptionManagerTest

Change-Id: I45d1abf15e4b105c966d4a786a4dc33aa67b20aa