Add system property for cameraserver -> app fmq metadata size

cameraserver used to earlier depend on reading a vendor property
which is not allowed by selinux. Add a system property instead.

Bug: 399723640

Test: GCA; No selinux errors reported

Flag: EXEMPT; bugfix

Change-Id: I4e1c31725930ad4a037955849d5ac41926766233
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
diff --git a/private/property_contexts b/private/property_contexts
index d7c2c94..ef2a788 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -508,6 +508,7 @@
 ro.camera.enableVirtualCamera      u:object_r:camera_config_prop:s0 exact bool
 ro.camera.disableHeicUltraHDR u:object_r:camera_config_prop:s0 exact bool
 ro.camera.enableSWHEVC        u:object_r:camera_config_prop:s0 exact bool
+ro.camera.resultFmqSize             u:object_r:camera_config_prop:s0 exact int
 
 ro.camerax.extensions.enabled u:object_r:camerax_extensions_prop:s0 exact bool