Upgrade gradle
Change-Id: I1a899e2e757c1266a60afdb4e43d9b2ab9805639
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
new file mode 100644
index 0000000..314d8a4
--- /dev/null
+++ b/app/proguard-rules.pro
@@ -0,0 +1,8 @@
+# The simpliest strategy is to not run proguard against your project's own code.
+# This doesn't provide the benefits of optimization & obfuscation against your
+# project, but will still strip the libraries. The advantage is that your app will
+# work without any subsequent effort. If you choose this strategy, the proguard
+# configuration for the project is simply the line below.
+
+# -keep class net.named_data.nfd.** { * ; }
+# -keep class net.named_data.jndn.** { * ; }