Export headers from libpiex am: b57a64fc86 am: 494cbf0978 am: ac412081f1
am: 25243c12c3

Change-Id: I26477c1fce520e9e23fd1f3d5d48dcd26b7b7dbf
diff --git a/Android.bp b/Android.bp
index 8e7ec9e..894bf3b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -31,6 +31,7 @@
         "src/tiff_parser.cc",
         "src/piex.cc",
     ],
+    export_include_dirs: ["."],
     static_libs: [
         "libbinary_parse",
         "libimage_type_recognition",