SEPolicy updates for camera HAL

Updates SEPolicy files to give camera HAL permission to access
Android Core Experiment flags.

Example denials:
11-30 13:08:33.172  1027  1027 W binder:1027_3: type=1400 audit(0.0:7): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=152 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
11-30 13:08:33.172  1027  1027 W binder:1027_3: type=1400 audit(0.0:8): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=152 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
11-30 13:08:33.244  1027  1027 W 3AThreadPool:  type=1400 audit(0.0:9): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=152 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0

Bug: 259433722
Test: m
Change-Id: I11165b56d7b7e38130698cf86d9739f878580a14
diff --git a/private/flags_health_check.te b/private/flags_health_check.te
index a26726d..0cc450d 100644
--- a/private/flags_health_check.te
+++ b/private/flags_health_check.te
@@ -28,6 +28,7 @@
 set_prop(flags_health_check, device_config_virtualization_framework_native_prop)
 set_prop(flags_health_check, device_config_memory_safety_native_prop)
 set_prop(flags_health_check, device_config_remote_key_provisioning_native_prop)
+set_prop(flags_health_check, device_config_camera_native_prop)
 
 # system property device_config_boot_count_prop is used for deciding when to perform server
 # configurable flags related disaster recovery. Mistakenly set up by unrelated components can, at a