DynamicCamera: Add new hidden APIs in AIDL and CameraService for injection camera

- Add new hidden APIs: injectCamera() and stopInjection() in AIDL and
Camera Service.
- Add the InjectionStatusListener class to detect the death of the
callback interface binder signal process, and then the camera service
can kill the injection camera.
- Implement the hardware::camera2::BnCameraInjectionSession interface.

Bug: 171021010
Test: Verified camera service use cases function as expected; no denials
Change-Id: I81850502c15942c3b03bc8da289f0b67a51c7fcb