Add dynamic_system service properties

Bug: 225310919
Test: adb shell setprop \
  dynamic_system.data_transfer.shared_memory.size 4096
Test: start a Dynamic System installation and verify the
  shared memory size override is effective.
Change-Id: Id0b29aa9c2332613c07e005b6091ceb824e2f129
diff --git a/private/property_contexts b/private/property_contexts
index f92e558..80ceafc 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -73,6 +73,7 @@
 persist.sys.tap_gesture u:object_r:gesture_prop:s0
 persist.sys.theme       u:object_r:theme_prop:s0
 persist.sys.fflag.override.settings_dynamic_system    u:object_r:dynamic_system_prop:s0
+dynamic_system.data_transfer.shared_memory.size       u:object_r:dynamic_system_prop:s0   exact   uint
 ro.sys.safemode         u:object_r:safemode_prop:s0
 persist.sys.audit_safemode      u:object_r:safemode_prop:s0
 persist.sys.dalvik.jvmtiagent   u:object_r:system_jvmti_agent_prop:s0