Fix instant app resolution

Resolving intents with a specified component goes down a different
path than regular resolution. For Instant Apps, that meant that
sometimes the Instant App was not able to resolve it's own
activities. Added some new CTS tests to verify that this works.

Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.EphemeralTest
Change-Id: Ic8a8eaef7eb9e230fdc701c79c85227d0939d974