Allow system server to set dynamic ART properties.

This change gives a new type (dalvik_dynamic_config_prop) to some ART
properties such as dalvik.vm.dex2oat-cpu-set and adds a new rule to
allow system server to set them.

Bug: 274530433
Test: Locally added some code to set those properties and saw it being
  successfull.
Change-Id: Ie28602e9039b7647656594ce5c184d29778fa089
diff --git a/private/property_contexts b/private/property_contexts
index 7324b61..00b2aee 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -407,31 +407,27 @@
 ro.vendor.camera.extensions.package u:object_r:camera2_extensions_prop:s0 exact string
 ro.vendor.camera.extensions.service u:object_r:camera2_extensions_prop:s0 exact string
 
-# ART properties
+# ART properties.
 dalvik.vm.                 u:object_r:dalvik_config_prop:s0
 ro.dalvik.vm.              u:object_r:dalvik_config_prop:s0
 ro.zygote                  u:object_r:dalvik_config_prop:s0 exact string
 
 # A set of ART properties listed explicitly for compatibility purposes.
-ro.dalvik.vm.native.bridge u:object_r:dalvik_config_prop:s0 exact string
+ro.dalvik.vm.native.bridge                    u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.always_debuggable                   u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.appimageformat                      u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.backgroundgctype                    u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.boot-dex2oat-cpu-set                u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.boot-dex2oat-threads                u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.boot-image                          u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.bgdexopt.new-classes-percent        u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.bgdexopt.new-methods-percent        u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.checkjni                            u:object_r:dalvik_config_prop:s0 exact bool
 dalvik.vm.dex2oat-Xms                         u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.dex2oat-Xmx                         u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.dex2oat-cpu-set                     u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.dex2oat-filter                      u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.dex2oat-flags                       u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.dex2oat-max-image-block-size        u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.dex2oat-minidebuginfo               u:object_r:dalvik_config_prop:s0 exact bool
 dalvik.vm.dex2oat-resolve-startup-strings     u:object_r:dalvik_config_prop:s0 exact bool
-dalvik.vm.dex2oat-threads                     u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.dex2oat-very-large                  u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.dex2oat-swap                        u:object_r:dalvik_config_prop:s0 exact bool
 dalvik.vm.dex2oat64.enabled                   u:object_r:dalvik_config_prop:s0 exact bool
@@ -450,10 +446,8 @@
 dalvik.vm.hot-startup-method-samples          u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.image-dex2oat-Xms                   u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.image-dex2oat-Xmx                   u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.image-dex2oat-cpu-set               u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.image-dex2oat-filter                u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.image-dex2oat-flags                 u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.image-dex2oat-threads               u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.isa.arm.features                    u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.isa.arm.variant                     u:object_r:dalvik_config_prop:s0 exact string
 dalvik.vm.isa.arm64.features                  u:object_r:dalvik_config_prop:s0 exact string
@@ -483,11 +477,21 @@
 dalvik.vm.profilebootclasspath                u:object_r:dalvik_config_prop:s0 exact bool
 dalvik.vm.ps-min-save-period-ms               u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.ps-resolved-classes-delay-ms        u:object_r:dalvik_config_prop:s0 exact int
-dalvik.vm.restore-dex2oat-cpu-set             u:object_r:dalvik_config_prop:s0 exact string
-dalvik.vm.restore-dex2oat-threads             u:object_r:dalvik_config_prop:s0 exact int
 dalvik.vm.usejit                              u:object_r:dalvik_config_prop:s0 exact bool
 dalvik.vm.zygote.max-boot-retry               u:object_r:dalvik_config_prop:s0 exact int
 
+# A list of ART properties that can be set dynamically.
+dalvik.vm.background-dex2oat-cpu-set          u:object_r:dalvik_dynamic_config_prop:s0 exact string
+dalvik.vm.background-dex2oat-threads          u:object_r:dalvik_dynamic_config_prop:s0 exact int
+dalvik.vm.boot-dex2oat-cpu-set                u:object_r:dalvik_dynamic_config_prop:s0 exact string
+dalvik.vm.boot-dex2oat-threads                u:object_r:dalvik_dynamic_config_prop:s0 exact int
+dalvik.vm.dex2oat-cpu-set                     u:object_r:dalvik_dynamic_config_prop:s0 exact string
+dalvik.vm.dex2oat-threads                     u:object_r:dalvik_dynamic_config_prop:s0 exact int
+dalvik.vm.image-dex2oat-cpu-set               u:object_r:dalvik_dynamic_config_prop:s0 exact string
+dalvik.vm.image-dex2oat-threads               u:object_r:dalvik_dynamic_config_prop:s0 exact int
+dalvik.vm.restore-dex2oat-cpu-set             u:object_r:dalvik_dynamic_config_prop:s0 exact string
+dalvik.vm.restore-dex2oat-threads             u:object_r:dalvik_dynamic_config_prop:s0 exact int
+
 persist.sys.dalvik.vm.lib.2 u:object_r:dalvik_runtime_prop:s0 exact string
 
 keyguard.no_require_sim u:object_r:keyguard_config_prop:s0 exact bool