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/922-properties/run b/test/922-properties/run
new file mode 100755
index 0000000..4379349
--- /dev/null
+++ b/test/922-properties/run
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+./default-run "$@" --experimental agents \
+                   --experimental runtime-plugins \
+                   --jvmti