Add instrumentation data to host proto lib

Add instrumentation data proto to host proto lib and add a few comment
to am instrument.
Test: no test needed

Change-Id: Ibbb0394dcf0ad27b53d5c97104456798863ce82c
diff --git a/Android.mk b/Android.mk
index 8fd63ee4..b847425 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1558,6 +1558,7 @@
 LOCAL_SOURCE_FILES_ALL_GENERATED := true
 LOCAL_SRC_FILES := \
     tools/streaming_proto/stream.proto \
+    cmds/am/proto/instrumentation_data.proto \
     $(call all-proto-files-under, core/proto) \
     $(call all-proto-files-under, libs/incident/proto)
 include $(BUILD_HOST_JAVA_LIBRARY)