Clear calling identity before binding instant app resolver

EphemeralResolverConnection always bind the instant app resolver installed
in user 0. It can be a problem if PMS is calling
EphemeralResolverConnection in a binder call from other users.
In which case, we are binding service in user 0 from other users and
security exception is thrown.

This fix assume it is WAI we always bind instant app resolver in user 0.

Fix: 38257043

Test: reboot, launch a work profile app that start an ACTION_VIEW intent
with http link. No crash observed.

Change-Id: Ic4e451b67ef127f05c3e594254b310da690a2324