Integrate 64-bit native libraries (required by Google Play)

Therefore change the way Keyboard and KdbLibrary are built and add (updated) native files for Keyboard.

src/java/KP2ASoftkeyboard_AS/.idea/gradle.xml

@@ -3,6 +3,9 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <compositeConfiguration>
+          <compositeBuild compositeDefinitionSource="SCRIPT" />
+        </compositeConfiguration>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleHome" value="C:\Program Files\Android\Android Studio1\gradle\gradle-2.10" />
@@ -14,6 +17,7 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
+        <option name="testRunner" value="PLATFORM" />
       </GradleProjectSettings>
     </option>
   </component>