Remove unnecessary libcore includes

This commit removes includes that don't appear to be needed.

Test: build
Bug: 111055375
Change-Id: I72465d0af56e408c5e99c1fd304bf2e7ff6d9f83
diff --git a/services/mediaanalytics/Android.mk b/services/mediaanalytics/Android.mk
index 2eeb7fa..5b20e61 100644
--- a/services/mediaanalytics/Android.mk
+++ b/services/mediaanalytics/Android.mk
@@ -34,8 +34,7 @@
     $(TOP)/frameworks/av/include/camera                             \
     $(TOP)/frameworks/native/include/media/openmax                  \
     $(TOP)/frameworks/native/include/media/hardware                 \
-    $(TOP)/external/tremolo/Tremolo                                 \
-    libcore/include
+    $(TOP)/external/tremolo/Tremolo
 
 
 LOCAL_MODULE:= mediametrics