Improve the logic to compile for Android by automatically detecting and setting up the Android NDK if needed.

platform/android/java/nativeSrcsConfigs/build.gradle

@@ -31,6 +31,8 @@ android {
         }
     }
 
+    ndkVersion versions.ndkVersion
+
     externalNativeBuild {
         cmake {
             path "CMakeLists.txt"