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/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 6b55714..b249a5c 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.8.1-all.zip