Upgrade dependencies and build system

This commit switches to use official Google NDK version 16 with packages
created/installed using android-crew-staging tool derived from CrystaX
project.

Change-Id: I248fef2a871e44375512dcbf15a5f3166c0ab5de
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 29be96d..6b55714 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Fri Jul 07 17:24:15 PDT 2017
+#Sun Nov 12 15:16:12 EST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.0.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip