ART: Add system properties support

Add simple support for GetSystemProperties, GetSystemProperty and
SetSystemProperty. Add a test.

Bug: 31455788
Test: m test-art-host-run-test-922-properties
Change-Id: I02914f04643f0f8fab96f1b372925c2c5306fc9b
diff --git a/test/Android.bp b/test/Android.bp
index 5a8f43e..f6648d1 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -262,6 +262,7 @@
         "913-heaps/heaps.cc",
         "918-fields/fields.cc",
         "920-objects/objects.cc",
+        "922-properties/properties.cc",
     ],
     shared_libs: [
         "libbase",