Add remote_provisioning.connect_timeout_millis as sysprop

Allow some services to control connection_timeout for testing purposes.

Test: atest RkpdAppUnitTests
Change-Id: Id70ed60c4f67e8f7910870a0b28a2b409fe97f62
diff --git a/private/property_contexts b/private/property_contexts
index 474316d..960a321 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1494,6 +1494,9 @@
 # Hostname for the remote provisioning server a device should communicate with
 remote_provisioning.hostname u:object_r:remote_prov_prop:s0 exact string
 
+# Connection Timeout for remote provisioning step
+remote_provisioning.connect_timeout_millis u:object_r:remote_prov_prop:s0 exact int
+
 # Broadcast boot stages, which keystore listens to
 keystore.boot_level u:object_r:keystore_listen_prop:s0 exact int