Add persist.heapprofd.enable property.

This is analoguous to what Perfetto does with persist.traced.enable.

Test: m
Test: flash walleye
Test: setprop persist.heapprofd.enable 1
      setprop persist.heapprofd.enable 0

Change-Id: I997272ef8c6fe078aca2388ed0cf2ecc3de612a5

private/compat/28.0/28.0.ignore.cil

@@ -39,6 +39,7 @@
     hal_system_suspend_default_exec
     hal_system_suspend_default_tmpfs
     heapprofd
+    heapprofd_enabled_prop
     heapprofd_exec
     heapprofd_prop
     heapprofd_socket

private/property_contexts

@@ -64,6 +64,7 @@ persist.service.        u:object_r:system_prop:s0
 persist.service.bdroid. u:object_r:bluetooth_prop:s0
 persist.security.       u:object_r:system_prop:s0
 persist.traced.enable   u:object_r:traced_enabled_prop:s0
+persist.heapprofd.enable u:object_r:heapprofd_enabled_prop:s0
 persist.vendor.overlay.  u:object_r:overlay_prop:s0
 ro.boot.vendor.overlay.  u:object_r:overlay_prop:s0
 ro.boottime.             u:object_r:boottime_prop:s0

public/property.te

@@ -38,6 +38,7 @@ type exported_secure_prop, property_type;
 type ffs_prop, property_type, core_property_type;
 type fingerprint_prop, property_type, core_property_type;
 type firstboot_prop, property_type;
+type heapprofd_enabled_prop, property_type;
 type heapprofd_prop, property_type;
 type hwservicemanager_prop, property_type;
 type last_boot_reason_prop, property_type;
@@ -397,6 +398,7 @@ compatible_property_only(`
     -device_config_reset_performed_prop
     -device_config_boot_count_prop
     -device_config_flags_health_check_prop
+    -heapprofd_enabled_prop
     -heapprofd_prop
     -hwservicemanager_prop
     -last_boot_reason_prop

public/shell.te

@@ -75,6 +75,9 @@ set_prop(shell, traced_enabled_prop)
 userdebug_or_eng(`set_prop(shell, log_prop)')
 # logpersist script
 userdebug_or_eng(`set_prop(shell, logpersistd_logging_prop)')
+# Allow shell to start/stop heapprofd via the persist.heapprofd.enable
+# property.
+set_prop(shell, heapprofd_enabled_prop)
 
 userdebug_or_eng(`
   # "systrace --boot" support - allow boottrace service to run