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/property_contexts b/private/property_contexts
index a6a6ce4..1f140d2 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -247,6 +247,7 @@
 device_config.reset_performed                       u:object_r:device_config_reset_performed_prop:s0
 persist.device_config.activity_manager_native_boot. u:object_r:device_config_activity_manager_native_boot_prop:s0
 persist.device_config.attempted_boot_count          u:object_r:device_config_boot_count_prop:s0
+persist.device_config.camera_native.                u:object_r:device_config_camera_native_prop:s0
 persist.device_config.configuration.                u:object_r:device_config_configuration_prop:s0
 persist.device_config.connectivity.                 u:object_r:device_config_connectivity_prop:s0
 persist.device_config.input_native_boot.            u:object_r:device_config_input_native_boot_prop:s0