libcameraservice: Refactor the CameraServiceProxyWrapper into a class.

This is necessary for writing a unit test for camera permissions that
checks behavior when the device policy manager has disabled the camera.
Using the true DevicePolicyManager service would require a test be run
while the device has a work profile - a much simpler method would be to
fake the results from CameraServiceProxyWrapper::isCameraDisabled with
an override.

The CameraServiceProxyWrapper is now managed by a shared_ptr that
originates in CameraService, unless this is overridden by an outside
source (cameraservice_test). As a consequence of this, some refactoring
has been done to CameraSessionStatsWrapper class to avoid circular
ownership between it and its parent (CameraServiceProxyWrapper).

Change-Id: Iad4ee87f5c5ab849eee65b72f46f77faf37f4d25
Test: CtsCameraTestCases
diff --git a/services/camera/libcameraservice/common/Camera2ClientBase.h b/services/camera/libcameraservice/common/Camera2ClientBase.h
index b0d1c3f..0dad50f 100644
--- a/services/camera/libcameraservice/common/Camera2ClientBase.h
+++ b/services/camera/libcameraservice/common/Camera2ClientBase.h
@@ -19,6 +19,7 @@
 
 #include "common/CameraDeviceBase.h"
 #include "camera/CaptureResult.h"
+#include "utils/CameraServiceProxyWrapper.h"
 
 namespace android {
 
@@ -47,6 +48,7 @@
     // TODO: too many params, move into a ClientArgs<T>
     Camera2ClientBase(const sp<CameraService>& cameraService,
                       const sp<TCamCallbacks>& remoteCallback,
+                      std::shared_ptr<CameraServiceProxyWrapper> cameraServiceProxyWrapper,
                       const String16& clientPackageName,
                       bool systemNativeClient,
                       const std::optional<String16>& clientFeatureId,
@@ -135,6 +137,7 @@
     pid_t mInitialClientPid;
     bool mOverrideForPerfClass = false;
     bool mLegacyClient = false;
+    std::shared_ptr<CameraServiceProxyWrapper> mCameraServiceProxyWrapper;
 
     virtual sp<IBinder> asBinderWrapper() {
         return IInterface::asBinder(this);