apexd: add apexd.config.loopback.readahead policy

Add policy to control apexd.config.loopback.readahead property

Bug: b/341845703

Change-Id: Id42574b9d0ef8fab8637e97bd00e8876f39c7b5f
Signed-off-by: Tim Tsai <mengtingtsai@google.com>
diff --git a/private/property_contexts b/private/property_contexts
index bfe2a52..2637752 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -314,6 +314,7 @@
 apexd.config.dm_create.timeout           u:object_r:apexd_config_prop:s0 exact uint
 apexd.config.loop_wait.attempts          u:object_r:apexd_config_prop:s0 exact uint
 apexd.config.boot_activation.threads     u:object_r:apexd_config_prop:s0 exact uint
+apexd.config.loopback.readahead          u:object_r:apexd_config_prop:s0 exact uint
 persist.apexd.          u:object_r:apexd_prop:s0
 persist.vendor.apex.    u:object_r:apexd_select_prop:s0
 ro.boot.vendor.apex.    u:object_r:apexd_select_prop:s0