Initial checkin of actionable memory metric.

Describes the actionable memory metric and provides an AmmTest.apk
application demonstrating use of the APIs modeled by the metric.

Java heap and dex code models are provided to start.

Bug: 69729799
Test: AmmTest.apk builds and runs on device.
Change-Id: I154ec7611ef968d68b764a9c5d4bde11ff607798
diff --git a/Android.mk b/Android.mk
index 361ceec..3267483 100644
--- a/Android.mk
+++ b/Android.mk
@@ -79,6 +79,7 @@
 include $(art_path)/oatdump/Android.mk
 include $(art_path)/tools/Android.mk
 include $(art_path)/tools/ahat/Android.mk
+include $(art_path)/tools/amm/Android.mk
 include $(art_path)/tools/dexfuzz/Android.mk
 include $(art_path)/libart_fake/Android.mk