camera2: Update CameraService for HAL1 shim.

Updates the camera service to handle shim connections.

Changes include:
- Adds begin/end configure binder calls.
- Adds cache for shim client static camera metadata.
- Implements basic getCameraCharacteristic functionality for shim clients.

Bug: 15116722
Bug: 15117269

Change-Id: I510c5888ca15f8e7d3b8ed1680ff1c7f8f514744