Convert libandroid and libandroid_runtime to Android.bp

See build/soong/README.md for more information.

Test: m -j checkbuild
Change-Id: Ie3c9c3d3c8c75ade36422d1e8ee0a5fe117e9091
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index 9f2d129..1d358f6 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -237,6 +237,7 @@
     },
 
     export_include_dirs: ["."],
+    export_shared_lib_headers: ["libRScpp"],
 }
 
 cc_library {
@@ -258,7 +259,6 @@
     srcs: [
         "debug/nullegl.cpp",
     ],
-    export_include_dirs: ["."],
 }
 
 cc_defaults {