Update the build file for TF rebase.

Bug: 109953668
Test: mm
Test: NeuralNetworksTest_static
Change-Id: I634895ce1d850142a0cba750c1ae74cc1270eceb
diff --git a/nn/common/Android.bp b/nn/common/Android.bp
index 97bf24f..7533afb 100644
--- a/nn/common/Android.bp
+++ b/nn/common/Android.bp
@@ -103,6 +103,7 @@
         "-Wall",
         "-Wextra",
         "-Wno-extern-c-compat",
+        "-Wno-sign-compare",
         "-Wno-unused-local-typedef",
         "-Wno-unused-parameter",
         "-Wno-unused-variable",