Option to gnuplot dex layout

Display the portions of the dex file that are accessed by the classes in
the dex file.  Optionally limit the display to only those classes that
are present in a runtime profile.

Bug: 29921113
Change-Id: I2a998fba448fec6c23941d3b4358531b1336e1b3
Test: dexlayout test
diff --git a/dexlayout/Android.bp b/dexlayout/Android.bp
index 296cdb6..0987df7 100644
--- a/dexlayout/Android.bp
+++ b/dexlayout/Android.bp
@@ -20,6 +20,7 @@
         "dexlayout.cc",
         "dex_ir.cc",
         "dex_ir_builder.cc",
+        "dex_visualize.cc",
     ],
     cflags: ["-Wall"],
     shared_libs: [