cameraservice: Add selinux policy for vndk cameraservice.

This CL adds a new cameraservice type to allow vendor clients of
cameraservice to query and find the stable cameraservice
implementation.

Bug: 243593375
Test: Manually tested that cameraservice can register a vendor facing
      instance.
Change-Id: I61499406d4811c898719abcb89c51b4b8a29f4a7
diff --git a/private/service_contexts b/private/service_contexts
index e9fc83c..645e91c 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -1,3 +1,4 @@
+android.frameworks.cameraservice.service.ICameraService/default      u:object_r:fwk_camera_service:s0
 android.frameworks.stats.IStats/default                              u:object_r:fwk_stats_service:s0
 android.frameworks.sensorservice.ISensorManager/default              u:object_r:fwk_sensor_service:s0
 android.hardware.audio.core.IConfig/default                          u:object_r:hal_audio_service:s0