Prevent Caching the Invalid Resource

In the old design, device may cached the invalid resource,
SubscriptionManager#getResourcesForSubId return the wrong
resource after factory reset. We clear the cache to prevent
the invalid resource.

Bug: 181202520
Test: atest SubscriptionControllerTest#testGetResourcesForSubId
      atest FrameworksTelephonyTests
Change-Id: Id16c76bec55b32937a723f1a0d825ab16f5e8afb