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/CameraDeviceBase.h b/services/camera/libcameraservice/common/CameraDeviceBase.h
index 983b2c1..cfc41c3 100644
--- a/services/camera/libcameraservice/common/CameraDeviceBase.h
+++ b/services/camera/libcameraservice/common/CameraDeviceBase.h
@@ -509,6 +509,10 @@
      */
     virtual status_t stopInjection() = 0;
 
+    // Inject session parameters into an existing client.
+    virtual status_t injectSessionParams(
+        const CameraMetadata& sessionParams) = 0;
+
 protected:
     bool mImageDumpMask = 0;
     std::vector<int64_t> mStreamUseCaseOverrides;