Import from a proprietary library in Java bindings for Android

Hi,

I'm trying to use the java bindings in an Android App. To make it work, I have to patch AndroidGfxProcessor.java manually because it imports a utility function from the MEGA Android app. This Android app is proprietary software that I am not allowed to include in my bundles.

I can see many solutions:

• Include this utility function into the SDK itself
• Use Log.d function from Android framework directly
• Make the Android App free software (which is a bad solution IMO, but would be a good thing to do in any case because I'm working on stuff that I could definitely contribute directly to the Android App)

Some other issues I came across while building JNIs:

• Still have to use an outdated version of the NDK
• Unlike what is stated in README, NDK_ROOT environment variable is ignored and the NDK is assumed to be located in ${HOME}/android-ndk in build.sh script.
• Pretty much every dependency in the JNI are outdated and got a lot of security patches since then.

Let me know if you want me to open new issues for this.