Resolve client package name and log connect early.

As a part of the effort to integrate AttributionSource into the camera
server and to avoid flag checks in too many locations, this change
approaches clustering resolution of the client's identity in a single
location. This will lead to a single flag check in a future CL whether
to rely on the AttributionSourceState data or to check for
USE_CALLING_*.

Flag: EXEMPT Strict mechanical refactor
Bug: 190657833
Test: atest CtsCameraTestCases, Camera1 + Camera2 apps
Change-Id: Ia07451da7926db7aff476f35974cbe31781045ad