Fix UnsatisfiedLinkError by adding missing ABI's

[phileo]

This fixes Issue #5.

I am using v3.3.0 of the OpenCV4Android SDK
Also fixed build warning in InitLibraryFragment.java

[royspartyman]

Could you explain how to add the generated aar into a project and import it into an Android activity? I cloned the project, pull the pull request code into my own branch, ran the project to generate the release.aar, and then I went to import that aar into my own android project but then I cannot access any of the sdk code.

[phileo]

@royspartyman if you wish to be able to set breakpoints and single step through the SDK code, you will need to import the SDK library source code into your own project as an Android Library module. Try the instructions provided here.

[royspartyman]

Would there be a way for you to add x86 and x86_64 support as well? I am failing at getting it added and would love this sdk to support the same versions that card.io does! @phileo

[phileo]

@royspartyman I've had trouble compiling the x86 & x86_64 openCV libraries so I did not include them in this pull request.

[girish878]

Hi,
I had same problem. Thank you @phileo I solved it with your help.