Implement session param injection in CameraService

- This allows injecting session params into existing camera clients.
- The injection is cleared upon the camera closing, and we do not keep
  state from one camera open to the next.
- We restrict the injection to only allow overriding vendor tags for now.
- The actionable parts of the change are gated behind the inject_session_params
  flag to allow easy flipping. When false, this feature will have no effect.

Bug: 308984721
Test: I tested that this works using adb shell.
Change-Id: I27d955d035dde57b63a220c5d68b505ec636c401
diff --git a/services/camera/libcameraservice/common/Camera2ClientBase.h b/services/camera/libcameraservice/common/Camera2ClientBase.h
index bac4af8..2bb90d9 100644
--- a/services/camera/libcameraservice/common/Camera2ClientBase.h
+++ b/services/camera/libcameraservice/common/Camera2ClientBase.h
@@ -18,6 +18,7 @@
 #define ANDROID_SERVERS_CAMERA_CAMERA2CLIENT_BASE_H
 
 #include "common/CameraDeviceBase.h"
+#include "camera/CameraMetadata.h"
 #include "camera/CaptureResult.h"
 #include "utils/CameraServiceProxyWrapper.h"
 #include "CameraServiceWatchdog.h"
@@ -136,6 +137,8 @@
                                sp<CameraProviderManager> manager) override;
     status_t      stopInjection() override;
 
+    status_t      injectSessionParams(const CameraMetadata& sessionParams) override;
+
 protected:
 
     // The PID provided in the constructor call