jni: Upgrade underlying NFD to version 0.6.2-11-gd657d53

This change replaces in-project JNI compilation of ndn-cxx and NFD with
packaged versions of ndn-cxx and NFD using a customized
android-crew-staging (https://github.com/named-data-mobile/android-crew-staging).
Refer to README-dev.md for more detail.

This commit also drops Logcat views

Refs: #4661

Change-Id: Id981689475d9da3aea63bea38d925f335c25b46e
diff --git a/build.gradle b/build.gradle
index cd98715..3904604 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.3'
         // classpath 'net.named-data.playground:play-publisher:1.2.0-2-SNAPSHOT'
         classpath 'com.github.triplet.gradle:play-publisher:1.2.0'