Add framework_watchdog_config_prop

The framework_watchdog_config_prop properties control framework watchdog
configurations to handle watchdog timeout loop. The properties are
written only by vendor_init.

More details and background: go/break-sys-watchdog-loop

Bug: 141948707
Change-Id: I6c0da5fdafba8165e79d0f04e0a82874f605a06d
diff --git a/private/property_contexts b/private/property_contexts
index ae85610..4673454 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -868,6 +868,10 @@
 cache_key.system_server.                 u:object_r:binder_cache_system_server_prop:s0 prefix string
 cache_key.telephony.                     u:object_r:binder_cache_telephony_server_prop:s0 prefix string
 
+# Framework watchdog configuration properties.
+framework_watchdog.fatal_count                u:object_r:framework_watchdog_config_prop:s0 exact int
+framework_watchdog.fatal_window.second        u:object_r:framework_watchdog_config_prop:s0 exact int
+
 gsm.sim.operator.numeric       u:object_r:telephony_status_prop:s0 exact string
 persist.radio.airplane_mode_on u:object_r:telephony_status_prop:s0 exact bool