Replace C++ with Cmake with GoLang gomobile

* Add ncsmsgo.arr which is the GoLang gomobile part
See: https://gitlab.com/nerzhul/ncsmsgo
* Android-NDK is not needed anymore
* Android app getVersion() now uses the Golang part
* Use the next getLastHTTPStatus() call in getVersion()
* Android app pushSms() now uses the Golang part
* JNI SmsBuffer has been replaced with GoLang aar bindings
-> This permits to remove some java code & increase performance
* Prepare a insecure switch flag to the Golang client

ncsmsgo/build.gradle

@@ -0,0 +1,2 @@
+configurations.maybeCreate("default")
+artifacts.add("default", file('ncsmsgo.aar'))

ncsmsgo/ncsmsgo.iml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id=":ncsmsgo" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="android-gradle" name="Android-Gradle">
+      <configuration>
+        <option name="GRADLE_PROJECT_PATH" value=":ncsmsgo" />
+      </configuration>
+    </facet>
+    <facet type="java-gradle" name="Java-Gradle">
+      <configuration>
+        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
+        <option name="BUILDABLE" value="false" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>