Export the FlexLexer.h header

Bug: 80546248
Test: treehugger
Change-Id: I6ea43113a421358b065037bbbea665b348da698f
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..c3bde3e
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,7 @@
+cc_library_headers {
+    name: "FlexLexer",
+    host_supported: true,
+    vendor_available: true,
+    export_include_dirs: ["common/flex"],
+    notice: "common/flex/NOTICE",
+}