Snap for 4386413 from b53c9ccd9814a7f3eceb6fc9d0cb9b5fddc42271 to pi-release

Change-Id: I28ae3c8fdc399204dd3fd9bba311b78dfd4ed661
diff --git a/Android.bp b/Android.bp
index cd7e229..82f6a7c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -169,6 +169,8 @@
         "-DHAVE_LRINTF",
         "-O2",
         "-fno-math-errno",
+        "-Wall",
+        "-Werror",
     ],
     cppflags: [
         "-DBSD=1",