ART: Add GetPhase

Extend RuntimePhaseCallback. Add support for GetPhase.
Add tests.

Bug: 31455788
Test: m test-art-host-run-test-901-hello-ti-agent
Change-Id: I33b1934a0789bc713675f21c2c9f676c9d3a1ed1
diff --git a/runtime/openjdkjvmti/Android.bp b/runtime/openjdkjvmti/Android.bp
index d5c6520..acdd0d3 100644
--- a/runtime/openjdkjvmti/Android.bp
+++ b/runtime/openjdkjvmti/Android.bp
@@ -27,6 +27,7 @@
            "ti_method.cc",
            "ti_monitor.cc",
            "ti_object.cc",
+           "ti_phase.cc",
            "ti_properties.cc",
            "ti_search.cc",
            "ti_stack.cc",