Add ro.zygote.disable_gl_preload to policy

It's used by ZygoteInit, and vendor_init should be able to set it.

Bug: 176210699
Test: boot
Change-Id: I27bb59c145f3257281fb8d6007be60eb2bcc93ca
diff --git a/private/property_contexts b/private/property_contexts
index 55f1c1c..cea1b6e 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1055,6 +1055,8 @@
 # zygote config property
 zygote.critical_window.minute u:object_r:zygote_config_prop:s0 exact int
 
+ro.zygote.disable_gl_preload u:object_r:zygote_config_prop:s0 exact bool
+
 # Enable Keystore 2.0.
 # TODO remove this propertye when Keystore 2.0 migration is complete b/171563717
 ro.android.security.keystore2.enable    u:object_r:keystore2_enable_prop:s0 exact bool