Reduce use of exported_system_prop

Reduce use of "exported_system_prop" by defining 2 new (currently
identical) "locale_prop" and "timezone_prop" types for the system
properties that are for "global system settings". See the comments in
private/property_contexts for details.

Initially the rights of the new types should be identical to
exported_system_prop but they will be reduced with a follow-up commit to
enable easier rollback / progress to be made on related work.

Bug: 236612872
Test: treehugger
Change-Id: I8d818342023bc462376c091b8a522532ccaf15d3
diff --git a/private/compat/33.0/33.0.cil b/private/compat/33.0/33.0.cil
index 163a300..849be82 100644
--- a/private/compat/33.0/33.0.cil
+++ b/private/compat/33.0/33.0.cil
@@ -1637,7 +1637,11 @@
 (typeattributeset exported_overlay_prop_33_0 (exported_overlay_prop))
 (typeattributeset exported_pm_prop_33_0 (exported_pm_prop))
 (typeattributeset exported_secure_prop_33_0 (exported_secure_prop))
-(typeattributeset exported_system_prop_33_0 (exported_system_prop))
+(typeattributeset exported_system_prop_33_0
+  ( exported_system_prop
+    locale_prop
+    timezone_prop
+))
 (typeattributeset external_vibrator_service_33_0 (external_vibrator_service))
 (typeattributeset extra_free_kbytes_33_0 (extra_free_kbytes))
 (typeattributeset extra_free_kbytes_exec_33_0 (extra_free_kbytes_exec))