Add multi-camera api example

[garylidd]

I'm working on stereo image capture on an Android device but can't find any examples of the Android NDK multi-camera API. The only reference I found is the test code on android official tests. Do you have any plan to add multi-camera api ndk samples ?

[DanAlbert]

Sorry for the delayed response. There wasn't anyone able to look after the repo for a while.

I'm focused mostly on improving what's already here rather than adding new samples at the moment, so the short answer is "no, no plans". I've started a backlog for missing samples though, and hopefully can get to it eventually.